/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:38:16,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:38:16,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:38:16,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:38:16,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:38:16,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:38:16,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:38:16,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:38:16,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:38:16,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:38:16,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:38:16,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:38:16,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:38:16,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:38:16,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:38:16,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:38:16,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:38:16,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:38:16,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:38:16,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:38:16,940 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:38:16,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:38:16,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:38:16,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:38:16,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:38:16,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 09:38:16,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:38:16,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:38:16,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:38:16,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:38:16,984 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:38:16,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:38:16,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:38:16,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:38:16,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:38:16,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:38:16,986 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:38:16,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:38:16,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:38:16,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:38:16,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:38:16,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:38:16,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:38:16,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:38:16,986 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:38:16,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:38:16,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:38:16,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:38:16,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:38:16,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:38:16,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:38:16,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:38:16,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:38:16,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:38:16,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:38:16,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:38:16,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:38:16,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:38:16,988 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:38:16,988 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:38:17,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:38:17,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:38:17,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:38:17,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:38:17,156 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:38:17,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i [2022-03-20 09:38:17,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839a38e4a/313167ad75c049bf9a5c6adb98dff6e4/FLAG741051695 [2022-03-20 09:38:17,523 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:38:17,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i [2022-03-20 09:38:17,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839a38e4a/313167ad75c049bf9a5c6adb98dff6e4/FLAG741051695 [2022-03-20 09:38:17,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839a38e4a/313167ad75c049bf9a5c6adb98dff6e4 [2022-03-20 09:38:17,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:38:17,540 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:38:17,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:38:17,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:38:17,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:38:17,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f35a697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17, skipping insertion in model container [2022-03-20 09:38:17,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:38:17,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:38:17,692 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2022-03-20 09:38:17,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:38:17,711 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:38:17,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2022-03-20 09:38:17,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:38:17,735 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:38:17,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17 WrapperNode [2022-03-20 09:38:17,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:38:17,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:38:17,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:38:17,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:38:17,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:38:17,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:38:17,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:38:17,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:38:17,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:38:17,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:38:17,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 09:38:17,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 09:38:17,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:38:17,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:38:17,807 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:38:17,807 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:38:17,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:38:17,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:38:17,807 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:38:17,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:38:17,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 09:38:17,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:38:17,853 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:38:17,854 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:38:17,937 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:38:17,941 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:38:17,941 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 09:38:17,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:38:17 BoogieIcfgContainer [2022-03-20 09:38:17,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:38:17,943 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:38:17,943 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:38:17,943 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:38:17,945 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:38:17" (1/1) ... [2022-03-20 09:38:17,954 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:38:17,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:38:17 BasicIcfg [2022-03-20 09:38:17,975 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:38:17,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:38:17,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:38:17,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:38:17,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:38:17" (1/4) ... [2022-03-20 09:38:17,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baf47d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:38:17, skipping insertion in model container [2022-03-20 09:38:17,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:38:17" (2/4) ... [2022-03-20 09:38:17,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baf47d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:38:17, skipping insertion in model container [2022-03-20 09:38:17,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:38:17" (3/4) ... [2022-03-20 09:38:17,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baf47d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:38:17, skipping insertion in model container [2022-03-20 09:38:17,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:38:17" (4/4) ... [2022-03-20 09:38:17,980 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound10.iqvasr [2022-03-20 09:38:17,983 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:38:17,983 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:38:18,018 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:38:18,038 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 09:38:18,039 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:38:18,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 09:38:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 09:38:18,053 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:38:18,053 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:38:18,054 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:38:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:38:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2022-03-20 09:38:18,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:38:18,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727056274] [2022-03-20 09:38:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:18,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:38:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:18,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:38:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:18,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:38:18,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727056274] [2022-03-20 09:38:18,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727056274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:38:18,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:38:18,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:38:18,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21730362] [2022-03-20 09:38:18,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:38:18,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:38:18,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:38:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:38:18,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:38:18,240 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-03-20 09:38:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:38:18,287 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-03-20 09:38:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:38:18,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-03-20 09:38:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:38:18,298 INFO L225 Difference]: With dead ends: 44 [2022-03-20 09:38:18,298 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 09:38:18,300 INFO L912 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 [2022-03-20 09:38:18,303 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:38:18,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:38:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 09:38:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 09:38:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:38:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-03-20 09:38:18,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-03-20 09:38:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:38:18,326 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-03-20 09:38:18,326 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-03-20 09:38:18,326 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-03-20 09:38:18,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 09:38:18,327 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:38:18,327 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:38:18,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:38:18,327 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:38:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:38:18,328 INFO L85 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2022-03-20 09:38:18,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:38:18,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081223576] [2022-03-20 09:38:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:18,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:38:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:18,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:38:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:18,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:38:18,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081223576] [2022-03-20 09:38:18,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081223576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:38:18,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:38:18,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 09:38:18,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356371953] [2022-03-20 09:38:18,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:38:18,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:38:18,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:38:18,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:38:18,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:38:18,404 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-03-20 09:38:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:38:18,458 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-03-20 09:38:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:38:18,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 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) Word has length 14 [2022-03-20 09:38:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:38:18,459 INFO L225 Difference]: With dead ends: 35 [2022-03-20 09:38:18,459 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 09:38:18,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:38:18,460 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:38:18,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:38:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 09:38:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 09:38:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:38:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-03-20 09:38:18,465 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2022-03-20 09:38:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:38:18,465 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-03-20 09:38:18,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-03-20 09:38:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-03-20 09:38:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 09:38:18,466 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:38:18,466 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:38:18,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 09:38:18,466 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:38:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:38:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2022-03-20 09:38:18,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:38:18,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310161258] [2022-03-20 09:38:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:18,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:38:18,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:38:18,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244140350] [2022-03-20 09:38:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:18,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:38:18,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:38:18,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:38:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:38:18,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:38:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:18,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:38:18,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:38:18,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310161258] [2022-03-20 09:38:18,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:38:18,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244140350] [2022-03-20 09:38:18,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244140350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:38:18,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:38:18,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:38:18,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819260290] [2022-03-20 09:38:18,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:38:18,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:38:18,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:38:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:38:18,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:38:18,601 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-03-20 09:38:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:38:18,614 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-20 09:38:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:38:18,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) Word has length 15 [2022-03-20 09:38:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:38:18,615 INFO L225 Difference]: With dead ends: 34 [2022-03-20 09:38:18,616 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 09:38:18,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:38:18,617 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:38:18,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 66 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:38:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 09:38:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 09:38:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:38:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-03-20 09:38:18,621 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-03-20 09:38:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:38:18,621 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-03-20 09:38:18,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-03-20 09:38:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-03-20 09:38:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 09:38:18,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:38:18,622 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:38:18,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 09:38:18,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:18,828 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:38:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:38:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2022-03-20 09:38:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:38:18,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456150500] [2022-03-20 09:38:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:38:18,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:38:18,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356695563] [2022-03-20 09:38:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:18,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:18,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:38:18,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:38:18,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:38:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 09:38:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:38:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:19,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:38:19,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:38:19,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456150500] [2022-03-20 09:38:19,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:38:19,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356695563] [2022-03-20 09:38:19,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356695563] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:38:19,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:38:19,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 09:38:19,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728285468] [2022-03-20 09:38:19,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:38:19,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 09:38:19,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:38:19,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 09:38:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:38:19,065 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:38:19,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:38:19,120 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-03-20 09:38:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:38:19,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 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 15 [2022-03-20 09:38:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:38:19,121 INFO L225 Difference]: With dead ends: 35 [2022-03-20 09:38:19,121 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 09:38:19,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-20 09:38:19,122 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:38:19,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:38:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 09:38:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 09:38:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 09:38:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-20 09:38:19,131 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2022-03-20 09:38:19,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:38:19,131 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-20 09:38:19,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:38:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-20 09:38:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 09:38:19,132 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:38:19,132 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:38:19,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 09:38:19,335 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 [2022-03-20 09:38:19,336 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:38:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:38:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2022-03-20 09:38:19,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:38:19,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963976478] [2022-03-20 09:38:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:38:19,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:38:19,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181398244] [2022-03-20 09:38:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:19,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:19,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:38:19,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:38:19,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:38:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:19,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:38:19,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:38:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:19,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:38:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:19,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:38:19,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963976478] [2022-03-20 09:38:19,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:38:19,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181398244] [2022-03-20 09:38:19,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181398244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:38:19,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:38:19,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 09:38:19,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522678117] [2022-03-20 09:38:19,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:38:19,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 09:38:19,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:38:19,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 09:38:19,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:38:19,490 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:38:19,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:38:19,555 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-20 09:38:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 09:38:19,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 09:38:19,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:38:19,557 INFO L225 Difference]: With dead ends: 66 [2022-03-20 09:38:19,557 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 09:38:19,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:38:19,558 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:38:19,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 125 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:38:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 09:38:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2022-03-20 09:38:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 09:38:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-03-20 09:38:19,562 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 17 [2022-03-20 09:38:19,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:38:19,563 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-03-20 09:38:19,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:38:19,563 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-03-20 09:38:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 09:38:19,563 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:38:19,563 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:38:19,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 09:38:19,776 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 [2022-03-20 09:38:19,776 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:38:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:38:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2022-03-20 09:38:19,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:38:19,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427674086] [2022-03-20 09:38:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:38:19,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:38:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023057472] [2022-03-20 09:38:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:19,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:19,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:38:19,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:38:19,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:38:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:19,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:38:19,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:38:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:19,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:38:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:19,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:38:19,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427674086] [2022-03-20 09:38:19,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:38:19,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023057472] [2022-03-20 09:38:19,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023057472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:38:19,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:38:19,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 09:38:19,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459177401] [2022-03-20 09:38:19,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:38:19,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 09:38:19,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:38:19,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 09:38:19,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:38:19,928 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:38:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:38:20,003 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2022-03-20 09:38:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 09:38:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 09:38:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:38:20,005 INFO L225 Difference]: With dead ends: 91 [2022-03-20 09:38:20,005 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 09:38:20,005 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:38:20,006 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:38:20,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 163 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:38:20,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 09:38:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2022-03-20 09:38:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 63 states have internal predecessors, (81), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 09:38:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2022-03-20 09:38:20,012 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 18 [2022-03-20 09:38:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:38:20,013 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2022-03-20 09:38:20,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:38:20,013 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2022-03-20 09:38:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 09:38:20,013 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:38:20,013 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:38:20,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 09:38:20,230 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 [2022-03-20 09:38:20,230 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:38:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:38:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2052329254, now seen corresponding path program 1 times [2022-03-20 09:38:20,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:38:20,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945130745] [2022-03-20 09:38:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:20,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:38:20,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:38:20,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934915008] [2022-03-20 09:38:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:20,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:20,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:38:20,243 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:38:20,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:38:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:20,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 09:38:20,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:38:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:20,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:38:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:20,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:38:20,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945130745] [2022-03-20 09:38:20,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:38:20,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934915008] [2022-03-20 09:38:20,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934915008] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 09:38:20,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:38:20,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-20 09:38:20,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446975006] [2022-03-20 09:38:20,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:38:20,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 09:38:20,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:38:20,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 09:38:20,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:38:20,576 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:38:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:38:20,599 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2022-03-20 09:38:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:38:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 18 [2022-03-20 09:38:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:38:20,602 INFO L225 Difference]: With dead ends: 110 [2022-03-20 09:38:20,602 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 09:38:20,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:38:20,604 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:38:20,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 104 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-03-20 09:38:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 09:38:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-03-20 09:38:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 89 states have internal predecessors, (104), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 09:38:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2022-03-20 09:38:20,635 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 18 [2022-03-20 09:38:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:38:20,635 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2022-03-20 09:38:20,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:38:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2022-03-20 09:38:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 09:38:20,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:38:20,636 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:38:20,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:38:20,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:20,844 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:38:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:38:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash 462666167, now seen corresponding path program 1 times [2022-03-20 09:38:20,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:38:20,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917940323] [2022-03-20 09:38:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:20,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:38:20,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:38:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380822805] [2022-03-20 09:38:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:20,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:20,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:38:20,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:38:20,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 09:38:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:20,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 09:38:20,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:38:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:20,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:38:20,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:38:20,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917940323] [2022-03-20 09:38:20,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:38:20,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380822805] [2022-03-20 09:38:20,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380822805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:38:20,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:38:20,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:38:20,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563615189] [2022-03-20 09:38:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:38:20,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:38:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:38:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:38:20,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:38:20,933 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:38:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:38:20,945 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2022-03-20 09:38:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:38:20,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-20 09:38:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:38:20,947 INFO L225 Difference]: With dead ends: 148 [2022-03-20 09:38:20,947 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 09:38:20,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:38:20,948 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:38:20,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:38:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 09:38:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 09:38:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 77 states have internal predecessors, (91), 13 states have call successors, (13), 10 states have call predecessors, (13), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 09:38:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-03-20 09:38:20,957 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 24 [2022-03-20 09:38:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:38:20,957 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-03-20 09:38:20,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:38:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-03-20 09:38:20,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 09:38:20,958 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:38:20,959 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:38:20,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 09:38:21,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:21,177 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:38:21,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:38:21,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1651364104, now seen corresponding path program 1 times [2022-03-20 09:38:21,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:38:21,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294486134] [2022-03-20 09:38:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:38:21,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:38:21,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803950531] [2022-03-20 09:38:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:21,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:21,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:38:21,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:38:21,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 09:38:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:21,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 09:38:21,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:38:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 09:38:21,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:38:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 09:38:21,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:38:21,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294486134] [2022-03-20 09:38:21,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:38:21,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803950531] [2022-03-20 09:38:21,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803950531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:38:21,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:38:21,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-20 09:38:21,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371380675] [2022-03-20 09:38:21,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:38:21,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 09:38:21,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:38:21,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 09:38:21,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:38:21,349 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:38:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:38:21,700 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2022-03-20 09:38:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 09:38:21,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-03-20 09:38:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:38:21,701 INFO L225 Difference]: With dead ends: 108 [2022-03-20 09:38:21,701 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 09:38:21,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:38:21,702 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:38:21,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 120 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:38:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 09:38:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 09:38:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 09:38:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2022-03-20 09:38:21,707 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 24 [2022-03-20 09:38:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:38:21,707 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2022-03-20 09:38:21,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:38:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2022-03-20 09:38:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 09:38:21,708 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:38:21,708 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:38:21,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 09:38:21,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:21,923 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:38:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:38:21,924 INFO L85 PathProgramCache]: Analyzing trace with hash -268589446, now seen corresponding path program 1 times [2022-03-20 09:38:21,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:38:21,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101050522] [2022-03-20 09:38:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:21,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:38:21,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:38:21,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412074728] [2022-03-20 09:38:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:38:21,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:38:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:38:21,933 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:38:21,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 09:38:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:38:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 09:38:21,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:38:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:38:22,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:38:30,809 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~b~0 4294967296))) (or (= (mod c_main_~A~0 4294967296) (mod (+ (* (div .cse0 2) (* c_main_~q~0 2)) c_main_~r~0) 4294967296)) (<= .cse0 (mod c_main_~r~0 4294967296)))) is different from true [2022-03-20 09:38:56,287 WARN L232 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:39:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-03-20 09:39:11,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:39:11,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101050522] [2022-03-20 09:39:11,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:39:11,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412074728] [2022-03-20 09:39:11,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412074728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:39:11,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:39:11,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-03-20 09:39:11,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517052102] [2022-03-20 09:39:11,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:39:11,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 09:39:11,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:39:11,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 09:39:11,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=91, Unknown=6, NotChecked=20, Total=156 [2022-03-20 09:39:11,210 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 09:40:04,791 WARN L232 SmtUtils]: Spent 45.05s on a formula simplification. DAG size of input: 32 DAG size of output: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:40:06,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:08,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:11,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:17,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:19,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:21,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:24,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:26,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:28,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:30,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:32,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:34,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:37,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:39,202 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:41,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:43,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:45,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:48,053 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~b~0 4294967296)) (.cse0 (mod c_main_~A~0 4294967296)) (.cse2 (* c_main_~q~0 2))) (and (= .cse0 (mod (+ (* (div .cse1 2) .cse2) c_main_~r~0) 4294967296)) (let ((.cse4 (mod (* c_main_~b~0 2) 4294967296)) (.cse3 (mod c_main_~r~0 4294967296))) (or (not (<= .cse1 .cse3)) (= .cse0 (mod (+ (* (div .cse4 2) .cse2) c_main_~r~0) 4294967296)) (<= .cse4 .cse3))))) is different from true [2022-03-20 09:40:50,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:52,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:40:54,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:41:12,321 WARN L232 SmtUtils]: Spent 13.65s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:41:14,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:41:16,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:41:18,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:41:20,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:41:23,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:41:25,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:41:27,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:41:29,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 09:41:31,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:41:33,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:41:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:41:34,154 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2022-03-20 09:41:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 09:41:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-03-20 09:41:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:41:34,156 INFO L225 Difference]: With dead ends: 162 [2022-03-20 09:41:34,156 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 09:41:34,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 97.2s TimeCoverageRelationStatistics Valid=64, Invalid=139, Unknown=15, NotChecked=54, Total=272 [2022-03-20 09:41:34,157 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 19 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 64.8s IncrementalHoareTripleChecker+Time [2022-03-20 09:41:34,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 157 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 79 Invalid, 30 Unknown, 57 Unchecked, 64.8s Time] [2022-03-20 09:41:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 09:41:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2022-03-20 09:41:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 78 states have (on average 1.205128205128205) internal successors, (94), 81 states have internal predecessors, (94), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 09:41:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2022-03-20 09:41:34,164 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 27 [2022-03-20 09:41:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:41:34,164 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2022-03-20 09:41:34,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 09:41:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2022-03-20 09:41:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 09:41:34,165 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:41:34,165 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:41:34,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 09:41:34,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 09:41:34,376 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:41:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:41:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1969058547, now seen corresponding path program 2 times [2022-03-20 09:41:34,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:41:34,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165177043] [2022-03-20 09:41:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:41:34,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:41:34,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:41:34,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846973603] [2022-03-20 09:41:34,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:41:34,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:41:34,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:41:34,388 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) [2022-03-20 09:41:34,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 09:41:34,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 09:41:34,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:41:34,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:41:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:41:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 09:41:34,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:41:34,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:41:34,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165177043] [2022-03-20 09:41:34,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:41:34,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846973603] [2022-03-20 09:41:34,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846973603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:41:34,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:41:34,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:41:34,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499687535] [2022-03-20 09:41:34,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:41:34,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:41:34,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:41:34,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:41:34,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:41:34,534 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:41:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:41:34,651 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2022-03-20 09:41:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:41:34,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 [2022-03-20 09:41:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:41:34,653 INFO L225 Difference]: With dead ends: 129 [2022-03-20 09:41:34,653 INFO L226 Difference]: Without dead ends: 126 [2022-03-20 09:41:34,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:41:34,654 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:41:34,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:41:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-20 09:41:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2022-03-20 09:41:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 90 states have internal predecessors, (102), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 09:41:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2022-03-20 09:41:34,660 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 29 [2022-03-20 09:41:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:41:34,661 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2022-03-20 09:41:34,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:41:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2022-03-20 09:41:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 09:41:34,662 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:41:34,662 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:41:34,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 09:41:34,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:41:34,875 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:41:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:41:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1111952806, now seen corresponding path program 2 times [2022-03-20 09:41:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:41:34,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597289013] [2022-03-20 09:41:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:41:34,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:41:34,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:41:34,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702665103] [2022-03-20 09:41:34,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:41:34,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:41:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:41:34,886 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:41:34,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process