/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/egcd3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 07:40:46,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 07:40:46,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 07:40:46,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 07:40:46,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 07:40:46,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 07:40:46,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 07:40:46,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 07:40:46,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 07:40:46,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 07:40:46,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 07:40:46,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 07:40:46,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 07:40:46,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 07:40:46,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 07:40:46,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 07:40:46,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 07:40:46,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 07:40:46,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 07:40:46,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 07:40:46,990 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 07:40:46,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 07:40:46,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 07:40:46,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 07:40:46,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 07:40:46,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 07:40:46,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 07:40:47,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 07:40:47,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 07:40:47,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 07:40:47,017 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 07:40:47,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 07:40:47,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 07:40:47,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 07:40:47,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 07:40:47,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 07:40:47,019 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 07:40:47,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 07:40:47,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 07:40:47,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 07:40:47,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 07:40:47,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 07:40:47,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 07:40:47,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 07:40:47,021 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 07:40:47,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 07:40:47,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 07:40:47,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 07:40:47,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 07:40:47,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:40:47,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 07:40:47,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 07:40:47,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 07:40:47,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 07:40:47,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 07:40:47,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 07:40:47,022 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 07:40:47,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 07:40:47,023 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 07:40:47,023 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 07:40:47,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 07:40:47,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 07:40:47,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 07:40:47,193 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 07:40:47,193 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 07:40:47,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-04-05 07:40:47,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa14d0bcb/6b660f04c10449d89810f40c2c8c11ac/FLAGd5f97d978 [2022-04-05 07:40:47,592 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 07:40:47,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-04-05 07:40:47,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa14d0bcb/6b660f04c10449d89810f40c2c8c11ac/FLAGd5f97d978 [2022-04-05 07:40:48,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa14d0bcb/6b660f04c10449d89810f40c2c8c11ac [2022-04-05 07:40:48,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 07:40:48,020 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 07:40:48,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 07:40:48,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 07:40:48,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 07:40:48,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed28f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48, skipping insertion in model container [2022-04-05 07:40:48,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 07:40:48,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 07:40:48,153 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/egcd3-ll_unwindbound5.c[490,503] [2022-04-05 07:40:48,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:40:48,189 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 07:40:48,199 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/egcd3-ll_unwindbound5.c[490,503] [2022-04-05 07:40:48,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:40:48,220 INFO L208 MainTranslator]: Completed translation [2022-04-05 07:40:48,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48 WrapperNode [2022-04-05 07:40:48,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 07:40:48,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 07:40:48,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 07:40:48,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 07:40:48,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 07:40:48,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 07:40:48,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 07:40:48,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 07:40:48,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:40:48,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:48,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 07:40:48,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 07:40:48,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 07:40:48,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 07:40:48,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 07:40:48,348 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 07:40:48,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 07:40:48,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 07:40:48,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 07:40:48,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 07:40:48,348 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 07:40:48,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 07:40:48,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 07:40:48,348 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 07:40:48,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 07:40:48,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 07:40:48,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 07:40:48,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 07:40:48,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 07:40:48,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 07:40:48,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 07:40:48,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 07:40:48,403 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 07:40:48,404 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 07:40:48,530 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 07:40:48,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 07:40:48,534 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 07:40:48,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:40:48 BoogieIcfgContainer [2022-04-05 07:40:48,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 07:40:48,536 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 07:40:48,536 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 07:40:48,537 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 07:40:48,538 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:40:48" (1/1) ... [2022-04-05 07:40:48,540 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 07:40:48,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:40:48 BasicIcfg [2022-04-05 07:40:48,550 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 07:40:48,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 07:40:48,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 07:40:48,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 07:40:48,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 07:40:48" (1/4) ... [2022-04-05 07:40:48,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf8c5f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:40:48, skipping insertion in model container [2022-04-05 07:40:48,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:48" (2/4) ... [2022-04-05 07:40:48,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf8c5f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:40:48, skipping insertion in model container [2022-04-05 07:40:48,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:40:48" (3/4) ... [2022-04-05 07:40:48,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf8c5f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:40:48, skipping insertion in model container [2022-04-05 07:40:48,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:40:48" (4/4) ... [2022-04-05 07:40:48,555 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.cqvasr [2022-04-05 07:40:48,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 07:40:48,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 07:40:48,621 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 07:40:48,625 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 07:40:48,625 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 07:40:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 07:40:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 07:40:48,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:48,649 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:48,649 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-04-05 07:40:48,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:48,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421247405] [2022-04-05 07:40:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:48,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:48,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:40:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:48,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 07:40:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:48,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 07:40:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:48,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:48,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421247405] [2022-04-05 07:40:48,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421247405] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:48,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:48,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 07:40:48,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565129649] [2022-04-05 07:40:48,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:48,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 07:40:48,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:48,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 07:40:48,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:40:48,874 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:48,955 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-04-05 07:40:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 07:40:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-05 07:40:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:48,965 INFO L225 Difference]: With dead ends: 74 [2022-04-05 07:40:48,965 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 07:40:48,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:40:48,971 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:48,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 07:40:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-05 07:40:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 07:40:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-04-05 07:40:49,012 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-04-05 07:40:49,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:49,012 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-04-05 07:40:49,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:49,013 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-04-05 07:40:49,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 07:40:49,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:49,014 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] [2022-04-05 07:40:49,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 07:40:49,015 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-04-05 07:40:49,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:49,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929668093] [2022-04-05 07:40:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:49,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:49,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072256774] [2022-04-05 07:40:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:49,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:49,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:49,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 07:40:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:49,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 07:40:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:49,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:49,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:49,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929668093] [2022-04-05 07:40:49,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:49,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072256774] [2022-04-05 07:40:49,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072256774] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:49,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:49,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 07:40:49,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408336063] [2022-04-05 07:40:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:49,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 07:40:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 07:40:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 07:40:49,206 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:49,216 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-04-05 07:40:49,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 07:40:49,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 07:40:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:49,217 INFO L225 Difference]: With dead ends: 44 [2022-04-05 07:40:49,217 INFO L226 Difference]: Without dead ends: 37 [2022-04-05 07:40:49,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 07:40:49,218 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:49,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-05 07:40:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-05 07:40:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 07:40:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-04-05 07:40:49,224 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-04-05 07:40:49,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:49,225 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-04-05 07:40:49,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-04-05 07:40:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 07:40:49,226 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:49,226 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] [2022-04-05 07:40:49,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:49,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:49,445 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:49,445 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-04-05 07:40:49,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:49,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736995728] [2022-04-05 07:40:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:49,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:49,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465838664] [2022-04-05 07:40:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:49,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:49,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:49,465 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:49,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 07:40:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:49,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:40:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:49,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:49,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:49,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736995728] [2022-04-05 07:40:49,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:49,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465838664] [2022-04-05 07:40:49,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465838664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:49,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:49,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 07:40:49,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391793596] [2022-04-05 07:40:49,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:49,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:40:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:49,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:40:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:40:49,623 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:49,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:49,702 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-04-05 07:40:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:40:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-04-05 07:40:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:49,705 INFO L225 Difference]: With dead ends: 57 [2022-04-05 07:40:49,705 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 07:40:49,706 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 07:40:49,706 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:49,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 148 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 07:40:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-04-05 07:40:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 07:40:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-04-05 07:40:49,713 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-04-05 07:40:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:49,713 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-04-05 07:40:49,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-04-05 07:40:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 07:40:49,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:49,714 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, 1, 1, 1, 1, 1] [2022-04-05 07:40:49,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:49,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 07:40:49,915 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:49,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-04-05 07:40:49,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:49,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218859085] [2022-04-05 07:40:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:49,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:49,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:49,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821365985] [2022-04-05 07:40:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:49,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:49,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:49,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:49,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 07:40:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:49,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:40:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:50,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:50,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:50,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218859085] [2022-04-05 07:40:50,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:50,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821365985] [2022-04-05 07:40:50,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821365985] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:50,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:50,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:40:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373699124] [2022-04-05 07:40:50,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:50,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:40:50,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:50,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:40:50,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:40:50,069 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:50,095 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-04-05 07:40:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:40:50,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-05 07:40:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:50,099 INFO L225 Difference]: With dead ends: 62 [2022-04-05 07:40:50,099 INFO L226 Difference]: Without dead ends: 40 [2022-04-05 07:40:50,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:40:50,102 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:50,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-05 07:40:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-05 07:40:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 07:40:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-04-05 07:40:50,118 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-04-05 07:40:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:50,118 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-04-05 07:40:50,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-04-05 07:40:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 07:40:50,119 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:50,119 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, 1, 1, 1, 1, 1] [2022-04-05 07:40:50,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:50,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:50,336 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-04-05 07:40:50,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:50,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826068372] [2022-04-05 07:40:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:50,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:50,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097625716] [2022-04-05 07:40:50,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:50,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:50,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:50,348 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:50,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 07:40:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:50,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 07:40:50,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:50,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:50,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:50,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826068372] [2022-04-05 07:40:50,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:50,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097625716] [2022-04-05 07:40:50,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097625716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:50,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:50,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-05 07:40:50,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4807654] [2022-04-05 07:40:50,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:50,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:40:50,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:50,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:40:50,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:40:50,616 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:50,758 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-04-05 07:40:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:40:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-04-05 07:40:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:50,759 INFO L225 Difference]: With dead ends: 68 [2022-04-05 07:40:50,759 INFO L226 Difference]: Without dead ends: 66 [2022-04-05 07:40:50,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:40:50,760 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 79 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:50,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 218 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-05 07:40:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-04-05 07:40:50,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 07:40:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-04-05 07:40:50,767 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-04-05 07:40:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:50,767 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-04-05 07:40:50,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-04-05 07:40:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 07:40:50,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:50,768 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, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:50,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-05 07:40:50,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:50,989 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-04-05 07:40:50,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:50,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741512304] [2022-04-05 07:40:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:51,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:51,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636384361] [2022-04-05 07:40:51,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:51,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:51,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:51,001 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:51,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 07:40:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:51,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:40:51,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:51,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:51,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:51,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741512304] [2022-04-05 07:40:51,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:51,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636384361] [2022-04-05 07:40:51,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636384361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:51,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:51,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-05 07:40:51,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207754024] [2022-04-05 07:40:51,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:51,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:40:51,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:51,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:40:51,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:40:51,172 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:40:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:51,243 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2022-04-05 07:40:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 07:40:51,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-04-05 07:40:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:51,245 INFO L225 Difference]: With dead ends: 116 [2022-04-05 07:40:51,245 INFO L226 Difference]: Without dead ends: 109 [2022-04-05 07:40:51,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:40:51,246 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 63 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:51,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 235 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-05 07:40:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2022-04-05 07:40:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.318840579710145) internal successors, (91), 72 states have internal predecessors, (91), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 07:40:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2022-04-05 07:40:51,256 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 30 [2022-04-05 07:40:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:51,256 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2022-04-05 07:40:51,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:40:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2022-04-05 07:40:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 07:40:51,257 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:51,257 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:51,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:51,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:51,473 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:51,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:51,474 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-04-05 07:40:51,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:51,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112402460] [2022-04-05 07:40:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:51,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:51,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:51,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523986270] [2022-04-05 07:40:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:51,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:51,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:51,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:51,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 07:40:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:51,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:40:51,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:51,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:51,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:51,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112402460] [2022-04-05 07:40:51,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:51,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523986270] [2022-04-05 07:40:51,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523986270] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:51,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:51,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-05 07:40:51,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806154173] [2022-04-05 07:40:51,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:51,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:40:51,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:40:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:40:51,685 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:51,842 INFO L93 Difference]: Finished difference Result 186 states and 263 transitions. [2022-04-05 07:40:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:40:51,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-05 07:40:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:51,845 INFO L225 Difference]: With dead ends: 186 [2022-04-05 07:40:51,845 INFO L226 Difference]: Without dead ends: 174 [2022-04-05 07:40:51,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-05 07:40:51,846 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 117 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:51,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 304 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-05 07:40:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2022-04-05 07:40:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 99 states have internal predecessors, (130), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 07:40:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-04-05 07:40:51,874 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 31 [2022-04-05 07:40:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:51,874 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-04-05 07:40:51,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-04-05 07:40:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 07:40:51,875 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:51,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:51,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:52,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:52,076 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:52,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:52,077 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-04-05 07:40:52,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:52,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699562066] [2022-04-05 07:40:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:52,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:52,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:52,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836966723] [2022-04-05 07:40:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:52,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:52,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:52,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:52,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 07:40:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:52,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 07:40:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:52,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:52,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:52,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699562066] [2022-04-05 07:40:52,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:52,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836966723] [2022-04-05 07:40:52,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836966723] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:52,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:52,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-05 07:40:52,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688817356] [2022-04-05 07:40:52,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:52,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:40:52,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:52,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:40:52,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:40:52,314 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 07:40:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:52,455 INFO L93 Difference]: Finished difference Result 156 states and 208 transitions. [2022-04-05 07:40:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:40:52,455 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-04-05 07:40:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:52,456 INFO L225 Difference]: With dead ends: 156 [2022-04-05 07:40:52,456 INFO L226 Difference]: Without dead ends: 154 [2022-04-05 07:40:52,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-05 07:40:52,457 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 80 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:52,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 241 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-05 07:40:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2022-04-05 07:40:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.3113207547169812) internal successors, (139), 108 states have internal predecessors, (139), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 07:40:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2022-04-05 07:40:52,467 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 34 [2022-04-05 07:40:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:52,467 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2022-04-05 07:40:52,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 07:40:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2022-04-05 07:40:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 07:40:52,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:52,483 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:52,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:52,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:52,706 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:52,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:52,706 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-04-05 07:40:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:52,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859299476] [2022-04-05 07:40:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:52,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:52,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:52,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582139736] [2022-04-05 07:40:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:52,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:52,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:52,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 07:40:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 07:40:52,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:52,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859299476] [2022-04-05 07:40:53,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582139736] [2022-04-05 07:40:53,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582139736] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:53,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:53,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-04-05 07:40:53,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582152130] [2022-04-05 07:40:53,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:53,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 07:40:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:53,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 07:40:53,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:40:53,021 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:40:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:53,192 INFO L93 Difference]: Finished difference Result 178 states and 239 transitions. [2022-04-05 07:40:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 07:40:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-05 07:40:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:53,194 INFO L225 Difference]: With dead ends: 178 [2022-04-05 07:40:53,194 INFO L226 Difference]: Without dead ends: 176 [2022-04-05 07:40:53,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:40:53,195 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 92 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:53,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 321 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-05 07:40:53,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2022-04-05 07:40:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 129 states have internal predecessors, (170), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-05 07:40:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 234 transitions. [2022-04-05 07:40:53,206 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 234 transitions. Word has length 36 [2022-04-05 07:40:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:53,206 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 234 transitions. [2022-04-05 07:40:53,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:40:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 234 transitions. [2022-04-05 07:40:53,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 07:40:53,207 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:53,207 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:53,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:53,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 07:40:53,425 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-04-05 07:40:53,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:53,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134544642] [2022-04-05 07:40:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:53,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:53,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217639983] [2022-04-05 07:40:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:53,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:53,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:53,436 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:53,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 07:40:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:53,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:40:53,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:53,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:53,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:53,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134544642] [2022-04-05 07:40:53,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:53,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217639983] [2022-04-05 07:40:53,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217639983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:53,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:53,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 07:40:53,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627907424] [2022-04-05 07:40:53,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:53,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:40:53,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:53,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:40:53,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:40:53,540 INFO L87 Difference]: Start difference. First operand 173 states and 234 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:53,563 INFO L93 Difference]: Finished difference Result 240 states and 327 transitions. [2022-04-05 07:40:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:40:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-05 07:40:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:53,565 INFO L225 Difference]: With dead ends: 240 [2022-04-05 07:40:53,565 INFO L226 Difference]: Without dead ends: 173 [2022-04-05 07:40:53,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:40:53,565 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:53,566 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 119 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:53,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-05 07:40:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-04-05 07:40:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.330708661417323) internal successors, (169), 129 states have internal predecessors, (169), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-05 07:40:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 233 transitions. [2022-04-05 07:40:53,576 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 233 transitions. Word has length 36 [2022-04-05 07:40:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:53,576 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 233 transitions. [2022-04-05 07:40:53,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 233 transitions. [2022-04-05 07:40:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 07:40:53,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:53,577 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:53,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:53,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 07:40:53,793 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:53,793 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-04-05 07:40:53,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:53,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895466352] [2022-04-05 07:40:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:53,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:53,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:53,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760209448] [2022-04-05 07:40:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:53,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:53,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:53,809 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:53,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 07:40:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:53,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:40:53,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 07:40:53,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:53,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:53,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895466352] [2022-04-05 07:40:53,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:53,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760209448] [2022-04-05 07:40:53,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760209448] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:53,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:53,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:40:53,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517642659] [2022-04-05 07:40:53,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:53,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:40:53,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:53,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:40:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:40:53,929 INFO L87 Difference]: Start difference. First operand 173 states and 233 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:40:53,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:53,971 INFO L93 Difference]: Finished difference Result 238 states and 333 transitions. [2022-04-05 07:40:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:40:53,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-05 07:40:53,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:53,974 INFO L225 Difference]: With dead ends: 238 [2022-04-05 07:40:53,974 INFO L226 Difference]: Without dead ends: 236 [2022-04-05 07:40:53,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:40:53,975 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:53,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-04-05 07:40:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 229. [2022-04-05 07:40:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 160 states have (on average 1.3625) internal successors, (218), 162 states have internal predecessors, (218), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-05 07:40:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 322 transitions. [2022-04-05 07:40:53,994 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 322 transitions. Word has length 39 [2022-04-05 07:40:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:53,995 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 322 transitions. [2022-04-05 07:40:53,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:40:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 322 transitions. [2022-04-05 07:40:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 07:40:53,996 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:53,997 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:54,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:54,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 07:40:54,211 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:54,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-04-05 07:40:54,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:54,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192863500] [2022-04-05 07:40:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:54,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:54,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:54,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549097456] [2022-04-05 07:40:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:54,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:54,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:54,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:54,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 07:40:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:54,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 07:40:54,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:54,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:54,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:54,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192863500] [2022-04-05 07:40:54,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:54,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549097456] [2022-04-05 07:40:54,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549097456] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:54,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:54,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-05 07:40:54,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581347354] [2022-04-05 07:40:54,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:54,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:40:54,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:40:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:40:54,549 INFO L87 Difference]: Start difference. First operand 229 states and 322 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 07:40:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:55,081 INFO L93 Difference]: Finished difference Result 391 states and 576 transitions. [2022-04-05 07:40:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 07:40:55,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-04-05 07:40:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:55,083 INFO L225 Difference]: With dead ends: 391 [2022-04-05 07:40:55,083 INFO L226 Difference]: Without dead ends: 389 [2022-04-05 07:40:55,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-04-05 07:40:55,084 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 159 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:55,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 348 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 07:40:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-04-05 07:40:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 376. [2022-04-05 07:40:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 265 states have (on average 1.4226415094339622) internal successors, (377), 267 states have internal predecessors, (377), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 90 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-05 07:40:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 561 transitions. [2022-04-05 07:40:55,108 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 561 transitions. Word has length 41 [2022-04-05 07:40:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:55,109 INFO L478 AbstractCegarLoop]: Abstraction has 376 states and 561 transitions. [2022-04-05 07:40:55,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 07:40:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 561 transitions. [2022-04-05 07:40:55,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 07:40:55,109 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:55,109 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:55,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:55,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 07:40:55,327 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:55,328 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-04-05 07:40:55,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:55,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303179492] [2022-04-05 07:40:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:55,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:55,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:55,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543225408] [2022-04-05 07:40:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:55,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:55,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:55,336 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:55,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 07:40:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:55,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:40:55,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 07:40:55,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:55,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303179492] [2022-04-05 07:40:55,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543225408] [2022-04-05 07:40:55,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543225408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:55,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:55,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:40:55,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974897457] [2022-04-05 07:40:55,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:55,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:40:55,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:40:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:40:55,437 INFO L87 Difference]: Start difference. First operand 376 states and 561 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-05 07:40:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:55,496 INFO L93 Difference]: Finished difference Result 560 states and 878 transitions. [2022-04-05 07:40:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:40:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-04-05 07:40:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:55,499 INFO L225 Difference]: With dead ends: 560 [2022-04-05 07:40:55,499 INFO L226 Difference]: Without dead ends: 558 [2022-04-05 07:40:55,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:40:55,499 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:55,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 166 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-04-05 07:40:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 494. [2022-04-05 07:40:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 306 states have (on average 1.4248366013071896) internal successors, (436), 327 states have internal predecessors, (436), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 147 states have call predecessors, (167), 167 states have call successors, (167) [2022-04-05 07:40:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 772 transitions. [2022-04-05 07:40:55,535 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 772 transitions. Word has length 44 [2022-04-05 07:40:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:55,535 INFO L478 AbstractCegarLoop]: Abstraction has 494 states and 772 transitions. [2022-04-05 07:40:55,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-05 07:40:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 772 transitions. [2022-04-05 07:40:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 07:40:55,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:55,536 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:55,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:55,752 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 07:40:55,752 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-04-05 07:40:55,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:55,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582363338] [2022-04-05 07:40:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:55,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:55,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:55,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325287316] [2022-04-05 07:40:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:55,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:55,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:55,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:55,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 07:40:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:55,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 07:40:55,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 07:40:55,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 07:40:55,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:55,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582363338] [2022-04-05 07:40:55,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:55,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325287316] [2022-04-05 07:40:55,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325287316] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:55,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:55,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-05 07:40:55,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132209924] [2022-04-05 07:40:55,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:55,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:40:55,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:55,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:40:55,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:40:55,947 INFO L87 Difference]: Start difference. First operand 494 states and 772 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:40:56,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:56,054 INFO L93 Difference]: Finished difference Result 859 states and 1366 transitions. [2022-04-05 07:40:56,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 07:40:56,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-05 07:40:56,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:56,057 INFO L225 Difference]: With dead ends: 859 [2022-04-05 07:40:56,057 INFO L226 Difference]: Without dead ends: 502 [2022-04-05 07:40:56,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:40:56,058 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 48 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:56,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 260 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:56,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-04-05 07:40:56,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 498. [2022-04-05 07:40:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 310 states have (on average 1.4161290322580644) internal successors, (439), 330 states have internal predecessors, (439), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-04-05 07:40:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 775 transitions. [2022-04-05 07:40:56,102 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 775 transitions. Word has length 42 [2022-04-05 07:40:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:56,102 INFO L478 AbstractCegarLoop]: Abstraction has 498 states and 775 transitions. [2022-04-05 07:40:56,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:40:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 775 transitions. [2022-04-05 07:40:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 07:40:56,103 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:56,103 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:56,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:56,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 07:40:56,319 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:56,319 INFO L85 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2022-04-05 07:40:56,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:56,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006956767] [2022-04-05 07:40:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:56,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:56,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:56,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619637409] [2022-04-05 07:40:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:56,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:56,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:56,326 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:56,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 07:40:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:56,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 07:40:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:56,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:56,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:56,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006956767] [2022-04-05 07:40:56,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:56,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619637409] [2022-04-05 07:40:56,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619637409] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:56,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:56,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-05 07:40:56,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640259002] [2022-04-05 07:40:56,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:56,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 07:40:56,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:56,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 07:40:56,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-05 07:40:56,518 INFO L87 Difference]: Start difference. First operand 498 states and 775 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:40:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:56,598 INFO L93 Difference]: Finished difference Result 859 states and 1363 transitions. [2022-04-05 07:40:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 07:40:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-04-05 07:40:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:56,600 INFO L225 Difference]: With dead ends: 859 [2022-04-05 07:40:56,600 INFO L226 Difference]: Without dead ends: 504 [2022-04-05 07:40:56,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:40:56,601 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 52 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:56,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 204 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-04-05 07:40:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2022-04-05 07:40:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 314 states have (on average 1.4044585987261147) internal successors, (441), 334 states have internal predecessors, (441), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-04-05 07:40:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 777 transitions. [2022-04-05 07:40:56,646 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 777 transitions. Word has length 42 [2022-04-05 07:40:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:56,647 INFO L478 AbstractCegarLoop]: Abstraction has 502 states and 777 transitions. [2022-04-05 07:40:56,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:40:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 777 transitions. [2022-04-05 07:40:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 07:40:56,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:56,647 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:56,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:56,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:56,863 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:56,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:56,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2022-04-05 07:40:56,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:56,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380222852] [2022-04-05 07:40:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:56,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:56,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:56,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038157822] [2022-04-05 07:40:56,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:40:56,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:56,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:56,871 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:56,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 07:40:56,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:40:56,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:40:56,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 07:40:56,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 07:40:56,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:56,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380222852] [2022-04-05 07:40:56,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038157822] [2022-04-05 07:40:56,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038157822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:56,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:56,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:40:56,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270139485] [2022-04-05 07:40:56,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:56,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:40:56,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:56,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:40:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:40:56,963 INFO L87 Difference]: Start difference. First operand 502 states and 777 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:57,065 INFO L93 Difference]: Finished difference Result 1073 states and 1723 transitions. [2022-04-05 07:40:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:40:57,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-04-05 07:40:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:57,068 INFO L225 Difference]: With dead ends: 1073 [2022-04-05 07:40:57,068 INFO L226 Difference]: Without dead ends: 760 [2022-04-05 07:40:57,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 07:40:57,069 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 29 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:57,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 173 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-04-05 07:40:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 523. [2022-04-05 07:40:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 351 states have (on average 1.396011396011396) internal successors, (490), 369 states have internal predecessors, (490), 153 states have call successors, (153), 19 states have call predecessors, (153), 18 states have return successors, (151), 134 states have call predecessors, (151), 151 states have call successors, (151) [2022-04-05 07:40:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 794 transitions. [2022-04-05 07:40:57,116 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 794 transitions. Word has length 43 [2022-04-05 07:40:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:57,116 INFO L478 AbstractCegarLoop]: Abstraction has 523 states and 794 transitions. [2022-04-05 07:40:57,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 794 transitions. [2022-04-05 07:40:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 07:40:57,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:57,117 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:57,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-05 07:40:57,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 07:40:57,331 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:57,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-04-05 07:40:57,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:57,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342155150] [2022-04-05 07:40:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:57,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:57,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:57,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531899610] [2022-04-05 07:40:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:57,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:57,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:57,339 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:57,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 07:40:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:57,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-05 07:40:57,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 07:40:57,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 07:40:58,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:58,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342155150] [2022-04-05 07:40:58,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:58,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531899610] [2022-04-05 07:40:58,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531899610] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:58,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:58,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-05 07:40:58,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718858802] [2022-04-05 07:40:58,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:58,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 07:40:58,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:58,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 07:40:58,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:40:58,414 INFO L87 Difference]: Start difference. First operand 523 states and 794 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-05 07:41:05,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:41:08,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:08,948 INFO L93 Difference]: Finished difference Result 838 states and 1289 transitions. [2022-04-05 07:41:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 07:41:08,949 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-04-05 07:41:08,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:08,952 INFO L225 Difference]: With dead ends: 838 [2022-04-05 07:41:08,952 INFO L226 Difference]: Without dead ends: 834 [2022-04-05 07:41:08,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-04-05 07:41:08,953 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 173 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:08,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 525 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-04-05 07:41:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-04-05 07:41:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 673. [2022-04-05 07:41:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 474 states have (on average 1.40084388185654) internal successors, (664), 486 states have internal predecessors, (664), 177 states have call successors, (177), 22 states have call predecessors, (177), 21 states have return successors, (175), 164 states have call predecessors, (175), 175 states have call successors, (175) [2022-04-05 07:41:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1016 transitions. [2022-04-05 07:41:09,049 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1016 transitions. Word has length 58 [2022-04-05 07:41:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:09,049 INFO L478 AbstractCegarLoop]: Abstraction has 673 states and 1016 transitions. [2022-04-05 07:41:09,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-05 07:41:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1016 transitions. [2022-04-05 07:41:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 07:41:09,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:09,050 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:41:09,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:09,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 07:41:09,250 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:09,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:09,251 INFO L85 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2022-04-05 07:41:09,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:09,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118931125] [2022-04-05 07:41:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:09,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:09,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:09,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780694978] [2022-04-05 07:41:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:09,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:09,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:09,263 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:41:09,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 07:41:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-05 07:41:09,317 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-05 07:41:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-05 07:41:09,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-05 07:41:09,385 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-05 07:41:09,386 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 07:41:09,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-05 07:41:09,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 07:41:09,590 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:41:09,592 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 07:41:09,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:41:09 BasicIcfg [2022-04-05 07:41:09,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 07:41:09,623 INFO L158 Benchmark]: Toolchain (without parser) took 21602.46ms. Allocated memory was 234.9MB in the beginning and 396.4MB in the end (delta: 161.5MB). Free memory was 178.2MB in the beginning and 298.1MB in the end (delta: -119.8MB). Peak memory consumption was 42.4MB. Max. memory is 8.0GB. [2022-04-05 07:41:09,623 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 234.9MB. Free memory was 194.4MB in the beginning and 194.3MB in the end (delta: 76.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 07:41:09,623 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.24ms. Allocated memory was 234.9MB in the beginning and 330.3MB in the end (delta: 95.4MB). Free memory was 178.0MB in the beginning and 300.8MB in the end (delta: -122.8MB). Peak memory consumption was 13.8MB. Max. memory is 8.0GB. [2022-04-05 07:41:09,623 INFO L158 Benchmark]: Boogie Preprocessor took 35.45ms. Allocated memory is still 330.3MB. Free memory was 300.8MB in the beginning and 299.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 07:41:09,623 INFO L158 Benchmark]: RCFGBuilder took 273.37ms. Allocated memory is still 330.3MB. Free memory was 299.1MB in the beginning and 287.9MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 07:41:09,623 INFO L158 Benchmark]: IcfgTransformer took 14.29ms. Allocated memory is still 330.3MB. Free memory was 287.9MB in the beginning and 286.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 07:41:09,624 INFO L158 Benchmark]: TraceAbstraction took 21071.11ms. Allocated memory was 330.3MB in the beginning and 396.4MB in the end (delta: 66.1MB). Free memory was 285.9MB in the beginning and 298.1MB in the end (delta: -12.2MB). Peak memory consumption was 55.9MB. Max. memory is 8.0GB. [2022-04-05 07:41:09,625 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 234.9MB. Free memory was 194.4MB in the beginning and 194.3MB in the end (delta: 76.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 187.24ms. Allocated memory was 234.9MB in the beginning and 330.3MB in the end (delta: 95.4MB). Free memory was 178.0MB in the beginning and 300.8MB in the end (delta: -122.8MB). Peak memory consumption was 13.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.45ms. Allocated memory is still 330.3MB. Free memory was 300.8MB in the beginning and 299.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 273.37ms. Allocated memory is still 330.3MB. Free memory was 299.1MB in the beginning and 287.9MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 14.29ms. Allocated memory is still 330.3MB. Free memory was 287.9MB in the beginning and 286.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 21071.11ms. Allocated memory was 330.3MB in the beginning and 396.4MB in the end (delta: 66.1MB). Free memory was 285.9MB in the beginning and 298.1MB in the end (delta: -12.2MB). Peak memory consumption was 55.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=10, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=2, b=3, counter=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.0s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 12.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1049 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 992 mSDsluCounter, 3689 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2838 mSDsCounter, 639 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2659 IncrementalHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 639 mSolverCounterUnsat, 851 mSDtfsCounter, 2659 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 914 GetRequests, 747 SyntacticMatches, 7 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=673occurred in iteration=17, InterpolantAutomatonStates: 154, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 578 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 666 NumberOfCodeBlocks, 666 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 859 ConstructedInterpolants, 0 QuantifiedInterpolants, 3856 SizeOfPredicates, 54 NumberOfNonLiveVariables, 2313 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 24 InterpolantComputations, 10 PerfectInterpolantSequences, 246/348 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-05 07:41:09,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...