/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/ps4-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 01:13:26,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 01:13:26,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 01:13:26,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 01:13:26,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 01:13:26,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 01:13:26,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 01:13:26,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 01:13:26,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 01:13:26,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 01:13:26,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 01:13:26,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 01:13:26,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 01:13:26,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 01:13:26,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 01:13:26,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 01:13:26,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 01:13:26,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 01:13:26,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 01:13:26,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 01:13:26,959 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 01:13:26,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 01:13:26,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 01:13:26,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 01:13:26,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 01:13:26,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 01:13:26,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 01:13:26,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 01:13:26,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 01:13:26,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-19 01:13:26,998 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 01:13:26,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 01:13:26,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 01:13:27,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 01:13:27,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 01:13:27,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 01:13:27,001 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 01:13:27,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 01:13:27,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 01:13:27,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 01:13:27,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 01:13:27,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 01:13:27,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 01:13:27,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 01:13:27,002 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 01:13:27,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 01:13:27,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 01:13:27,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 01:13:27,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 01:13:27,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 01:13:27,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 01:13:27,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 01:13:27,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 01:13:27,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 01:13:27,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 01:13:27,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 01:13:27,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-19 01:13:27,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-19 01:13:27,004 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-19 01:13:27,004 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 01:13:27,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 01:13:27,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 01:13:27,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 01:13:27,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 01:13:27,229 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 01:13:27,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2022-03-19 01:13:27,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529b5955c/7780b5deb37a49b4ba218d7dcbcc369c/FLAG5ea74b30e [2022-03-19 01:13:27,649 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 01:13:27,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2022-03-19 01:13:27,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529b5955c/7780b5deb37a49b4ba218d7dcbcc369c/FLAG5ea74b30e [2022-03-19 01:13:28,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529b5955c/7780b5deb37a49b4ba218d7dcbcc369c [2022-03-19 01:13:28,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 01:13:28,085 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-19 01:13:28,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 01:13:28,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 01:13:28,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 01:13:28,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ec9fa0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28, skipping insertion in model container [2022-03-19 01:13:28,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 01:13:28,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 01:13:28,241 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/ps4-ll_unwindbound10.c[458,471] [2022-03-19 01:13:28,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 01:13:28,261 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 01:13:28,271 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/ps4-ll_unwindbound10.c[458,471] [2022-03-19 01:13:28,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 01:13:28,294 INFO L208 MainTranslator]: Completed translation [2022-03-19 01:13:28,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28 WrapperNode [2022-03-19 01:13:28,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 01:13:28,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 01:13:28,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 01:13:28,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 01:13:28,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 01:13:28,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 01:13:28,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 01:13:28,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 01:13:28,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 01:13:28,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:28,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 01:13:28,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 01:13:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 01:13:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 01:13:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 01:13:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 01:13:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 01:13:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 01:13:28,424 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 01:13:28,425 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 01:13:28,425 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 01:13:28,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 01:13:28,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-19 01:13:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 01:13:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 01:13:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 01:13:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 01:13:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 01:13:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 01:13:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 01:13:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 01:13:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 01:13:28,482 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 01:13:28,484 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 01:13:28,615 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 01:13:28,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 01:13:28,619 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 01:13:28,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:13:28 BoogieIcfgContainer [2022-03-19 01:13:28,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 01:13:28,621 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-19 01:13:28,621 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-19 01:13:28,636 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-19 01:13:28,638 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:13:28" (1/1) ... [2022-03-19 01:13:28,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 01:13:28 BasicIcfg [2022-03-19 01:13:28,649 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-19 01:13:28,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 01:13:28,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 01:13:28,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 01:13:28,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 01:13:28" (1/4) ... [2022-03-19 01:13:28,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232d1bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:13:28, skipping insertion in model container [2022-03-19 01:13:28,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:28" (2/4) ... [2022-03-19 01:13:28,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232d1bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:13:28, skipping insertion in model container [2022-03-19 01:13:28,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:13:28" (3/4) ... [2022-03-19 01:13:28,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232d1bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 01:13:28, skipping insertion in model container [2022-03-19 01:13:28,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 01:13:28" (4/4) ... [2022-03-19 01:13:28,669 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.cqvasr [2022-03-19 01:13:28,672 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 01:13:28,672 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 01:13:28,733 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 01:13:28,738 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 01:13:28,738 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 01:13:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 01:13:28,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 01:13:28,767 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:28,768 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:28,768 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:28,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:28,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1984627219, now seen corresponding path program 1 times [2022-03-19 01:13:28,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:28,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086943881] [2022-03-19 01:13:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:28,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:13:28,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:13:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:13:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:13:28,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:28,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086943881] [2022-03-19 01:13:28,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086943881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:13:28,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:13:28,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 01:13:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220492639] [2022-03-19 01:13:28,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:13:28,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 01:13:28,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:28,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 01:13:28,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 01:13:28,940 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:13:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:29,011 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-03-19 01:13:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 01:13:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 01:13:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:29,022 INFO L225 Difference]: With dead ends: 41 [2022-03-19 01:13:29,022 INFO L226 Difference]: Without dead ends: 19 [2022-03-19 01:13:29,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 01:13:29,028 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:29,028 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:13:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-19 01:13:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-03-19 01:13:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 01:13:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-03-19 01:13:29,054 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2022-03-19 01:13:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:29,054 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-03-19 01:13:29,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:13:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-03-19 01:13:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 01:13:29,055 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:29,055 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:29,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 01:13:29,056 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1423332195, now seen corresponding path program 1 times [2022-03-19 01:13:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:29,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591279357] [2022-03-19 01:13:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:29,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:29,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:29,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173944436] [2022-03-19 01:13:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:29,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:29,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:29,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:13:29,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 01:13:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:13:29,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 01:13:29,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:13:29,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 01:13:29,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:29,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591279357] [2022-03-19 01:13:29,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173944436] [2022-03-19 01:13:29,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173944436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:13:29,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:13:29,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:13:29,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342915720] [2022-03-19 01:13:29,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:13:29,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:13:29,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:13:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:13:29,164 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:13:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:29,173 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-19 01:13:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:13:29,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 01:13:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:29,174 INFO L225 Difference]: With dead ends: 28 [2022-03-19 01:13:29,174 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 01:13:29,174 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:13:29,175 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:29,176 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:13:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 01:13:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-19 01:13:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 01:13:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-19 01:13:29,180 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-03-19 01:13:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:29,180 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-19 01:13:29,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:13:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-19 01:13:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 01:13:29,181 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:29,181 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:29,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:29,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:29,394 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:29,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1424404671, now seen corresponding path program 1 times [2022-03-19 01:13:29,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:29,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252536046] [2022-03-19 01:13:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:29,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:29,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:29,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232792228] [2022-03-19 01:13:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:29,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:29,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:29,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:13:29,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 01:13:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:13:29,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 01:13:29,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:13:29,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 01:13:29,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:29,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252536046] [2022-03-19 01:13:29,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:29,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232792228] [2022-03-19 01:13:29,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232792228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:13:29,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:13:29,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 01:13:29,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737769441] [2022-03-19 01:13:29,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:13:29,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 01:13:29,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:29,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 01:13:29,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:13:29,490 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:13:29,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:29,519 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-03-19 01:13:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 01:13:29,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 01:13:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:29,521 INFO L225 Difference]: With dead ends: 30 [2022-03-19 01:13:29,521 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 01:13:29,521 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 01:13:29,522 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:29,522 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:13:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 01:13:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-19 01:13:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 01:13:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-03-19 01:13:29,528 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2022-03-19 01:13:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:29,528 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-03-19 01:13:29,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:13:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-03-19 01:13:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 01:13:29,529 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:29,529 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:29,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:29,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 01:13:29,744 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:29,744 INFO L85 PathProgramCache]: Analyzing trace with hash -381498108, now seen corresponding path program 1 times [2022-03-19 01:13:29,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:29,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751915964] [2022-03-19 01:13:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:29,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:29,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:29,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929243852] [2022-03-19 01:13:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:29,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:29,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:29,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:13:29,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 01:13:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:13:29,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 01:13:29,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:13:29,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:13:30,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:30,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751915964] [2022-03-19 01:13:30,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:30,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929243852] [2022-03-19 01:13:30,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929243852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 01:13:30,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 01:13:30,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 01:13:30,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743438233] [2022-03-19 01:13:30,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:30,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 01:13:30,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:30,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 01:13:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 01:13:30,031 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 01:13:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:30,112 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-03-19 01:13:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 01:13:30,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-03-19 01:13:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:30,114 INFO L225 Difference]: With dead ends: 60 [2022-03-19 01:13:30,114 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 01:13:30,115 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-19 01:13:30,116 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:30,116 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 110 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:13:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 01:13:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-03-19 01:13:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 01:13:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-03-19 01:13:30,124 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 20 [2022-03-19 01:13:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:30,124 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-03-19 01:13:30,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 01:13:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-03-19 01:13:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 01:13:30,125 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:30,125 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:30,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:30,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:30,341 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:30,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:30,342 INFO L85 PathProgramCache]: Analyzing trace with hash -380425632, now seen corresponding path program 1 times [2022-03-19 01:13:30,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:30,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906652572] [2022-03-19 01:13:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:30,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:30,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:30,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902379807] [2022-03-19 01:13:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:30,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:30,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:13:30,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 01:13:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:13:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 01:13:30,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:13:30,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 01:13:30,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:30,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906652572] [2022-03-19 01:13:30,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:30,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902379807] [2022-03-19 01:13:30,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902379807] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 01:13:30,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:13:30,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 01:13:30,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927746583] [2022-03-19 01:13:30,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:13:30,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 01:13:30,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:30,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 01:13:30,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 01:13:30,859 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 01:13:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:30,887 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-03-19 01:13:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 01:13:30,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 01:13:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:30,889 INFO L225 Difference]: With dead ends: 62 [2022-03-19 01:13:30,889 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 01:13:30,890 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 01:13:30,890 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:30,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:13:30,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 01:13:30,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-03-19 01:13:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 01:13:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-03-19 01:13:30,897 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 20 [2022-03-19 01:13:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:30,897 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-03-19 01:13:30,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 01:13:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-03-19 01:13:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 01:13:30,898 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:30,898 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:30,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:31,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:31,120 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:31,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:31,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1647871298, now seen corresponding path program 1 times [2022-03-19 01:13:31,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:31,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274438319] [2022-03-19 01:13:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:31,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:31,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:31,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820315414] [2022-03-19 01:13:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:31,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:31,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:31,140 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:13:31,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 01:13:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:13:31,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 01:13:31,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 01:13:31,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:35,523 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse1 (* 13 c_main_~y~0 c_main_~y~0)) (.cse2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (not (<= (div (+ .cse0 .cse1 4 .cse2) 4) (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse3 (+ c_main_~y~0 1))) (= (* .cse3 .cse3) (* main_~k~0 .cse3))))) (not (= 0 (mod (+ .cse0 .cse1 .cse2) 4))))) is different from false [2022-03-19 01:13:37,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274438319] [2022-03-19 01:13:37,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820315414] [2022-03-19 01:13:37,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820315414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:13:37,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:13:37,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 01:13:37,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648395101] [2022-03-19 01:13:37,556 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:37,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 01:13:37,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 01:13:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=140, Unknown=1, NotChecked=24, Total=210 [2022-03-19 01:13:37,557 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 01:13:37,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:37,663 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-03-19 01:13:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 01:13:37,663 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-03-19 01:13:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:37,664 INFO L225 Difference]: With dead ends: 50 [2022-03-19 01:13:37,664 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 01:13:37,664 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=66, Invalid=209, Unknown=1, NotChecked=30, Total=306 [2022-03-19 01:13:37,665 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:37,665 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 113 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:13:37,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 01:13:37,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-19 01:13:37,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 01:13:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-03-19 01:13:37,670 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 26 [2022-03-19 01:13:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:37,670 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-03-19 01:13:37,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 01:13:37,670 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-03-19 01:13:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 01:13:37,671 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:37,671 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:37,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:37,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:37,878 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash 31133987, now seen corresponding path program 2 times [2022-03-19 01:13:37,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:37,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055223551] [2022-03-19 01:13:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:37,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:37,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:37,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123616602] [2022-03-19 01:13:37,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 01:13:37,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:37,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:37,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:13:37,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 01:13:37,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 01:13:37,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:13:37,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 01:13:37,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 01:13:38,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:38,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:38,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055223551] [2022-03-19 01:13:38,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:38,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123616602] [2022-03-19 01:13:38,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123616602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:13:38,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:13:38,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-19 01:13:38,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845494543] [2022-03-19 01:13:38,197 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:38,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 01:13:38,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:38,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 01:13:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 01:13:38,199 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 01:13:38,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:38,260 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-03-19 01:13:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 01:13:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-03-19 01:13:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:38,261 INFO L225 Difference]: With dead ends: 50 [2022-03-19 01:13:38,261 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 01:13:38,261 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 01:13:38,261 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:38,262 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 152 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:13:38,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 01:13:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-19 01:13:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 01:13:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-03-19 01:13:38,266 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2022-03-19 01:13:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:38,266 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-03-19 01:13:38,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 01:13:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-03-19 01:13:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 01:13:38,267 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:38,267 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:38,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:38,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:38,479 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1474833412, now seen corresponding path program 3 times [2022-03-19 01:13:38,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:38,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975942495] [2022-03-19 01:13:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:38,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:38,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957878386] [2022-03-19 01:13:38,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 01:13:38,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:38,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:38,492 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:13:38,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 01:13:38,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 01:13:38,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:13:38,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 01:13:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 01:13:38,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:38,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:38,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975942495] [2022-03-19 01:13:38,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:38,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957878386] [2022-03-19 01:13:38,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957878386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:13:38,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:13:38,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 01:13:38,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061203765] [2022-03-19 01:13:38,884 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:38,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 01:13:38,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 01:13:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 01:13:38,885 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 01:13:38,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:38,956 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-03-19 01:13:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 01:13:38,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2022-03-19 01:13:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:38,957 INFO L225 Difference]: With dead ends: 52 [2022-03-19 01:13:38,957 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 01:13:38,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-19 01:13:38,958 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:38,958 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 198 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:13:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 01:13:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 01:13:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 01:13:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-03-19 01:13:38,963 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2022-03-19 01:13:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:38,964 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-03-19 01:13:38,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 01:13:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-03-19 01:13:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 01:13:38,964 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:38,965 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:38,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:39,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:39,181 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash 831591399, now seen corresponding path program 2 times [2022-03-19 01:13:39,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:39,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351663955] [2022-03-19 01:13:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:39,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:39,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:39,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442832848] [2022-03-19 01:13:39,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 01:13:39,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:39,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:39,190 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:13:39,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 01:13:39,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 01:13:39,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:13:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 01:13:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:13:39,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 01:13:39,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:39,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351663955] [2022-03-19 01:13:39,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:39,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442832848] [2022-03-19 01:13:39,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442832848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 01:13:39,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 01:13:39,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 01:13:39,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73672186] [2022-03-19 01:13:39,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:39,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 01:13:39,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 01:13:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 01:13:39,458 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 01:13:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:39,596 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2022-03-19 01:13:39,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 01:13:39,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 44 [2022-03-19 01:13:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:39,597 INFO L225 Difference]: With dead ends: 123 [2022-03-19 01:13:39,597 INFO L226 Difference]: Without dead ends: 118 [2022-03-19 01:13:39,598 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-19 01:13:39,598 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:39,598 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 148 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:13:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-19 01:13:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 93. [2022-03-19 01:13:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 01:13:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2022-03-19 01:13:39,606 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 44 [2022-03-19 01:13:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:39,606 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2022-03-19 01:13:39,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 01:13:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2022-03-19 01:13:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 01:13:39,607 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:39,607 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:39,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:39,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 01:13:39,823 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1805593115, now seen corresponding path program 4 times [2022-03-19 01:13:39,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:39,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856838892] [2022-03-19 01:13:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:39,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:39,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624035519] [2022-03-19 01:13:39,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 01:13:39,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:39,831 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:13:39,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 01:13:39,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 01:13:39,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:13:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 01:13:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 01:13:40,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:40,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856838892] [2022-03-19 01:13:40,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624035519] [2022-03-19 01:13:40,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624035519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:13:40,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:13:40,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 01:13:40,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287056114] [2022-03-19 01:13:40,468 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:40,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 01:13:40,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 01:13:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-19 01:13:40,469 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 01:13:40,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:40,570 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-03-19 01:13:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 01:13:40,571 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-03-19 01:13:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:40,572 INFO L225 Difference]: With dead ends: 98 [2022-03-19 01:13:40,573 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 01:13:40,573 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-19 01:13:40,573 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:40,574 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 250 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:13:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 01:13:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-19 01:13:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 01:13:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2022-03-19 01:13:40,582 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 50 [2022-03-19 01:13:40,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:40,582 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2022-03-19 01:13:40,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 01:13:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2022-03-19 01:13:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 01:13:40,585 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:40,585 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:40,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:40,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 01:13:40,799 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:40,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1447431878, now seen corresponding path program 5 times [2022-03-19 01:13:40,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:40,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834410982] [2022-03-19 01:13:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:40,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:40,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43628275] [2022-03-19 01:13:40,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 01:13:40,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:40,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:40,809 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) [2022-03-19 01:13:40,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 01:13:40,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-19 01:13:40,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:13:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 01:13:41,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 01:13:41,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:41,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:41,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834410982] [2022-03-19 01:13:41,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:41,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43628275] [2022-03-19 01:13:41,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43628275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:13:41,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:13:41,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 01:13:41,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880564149] [2022-03-19 01:13:41,372 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:41,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 01:13:41,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:41,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 01:13:41,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 01:13:41,374 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 01:13:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:41,490 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-03-19 01:13:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 01:13:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2022-03-19 01:13:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:41,492 INFO L225 Difference]: With dead ends: 98 [2022-03-19 01:13:41,492 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 01:13:41,492 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 01:13:41,493 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:41,493 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 308 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:13:41,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 01:13:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-19 01:13:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 01:13:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-03-19 01:13:41,511 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 58 [2022-03-19 01:13:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:41,511 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-03-19 01:13:41,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 01:13:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-03-19 01:13:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 01:13:41,515 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:41,515 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:41,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:41,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 01:13:41,720 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:41,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1416046937, now seen corresponding path program 6 times [2022-03-19 01:13:41,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:41,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636731468] [2022-03-19 01:13:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:41,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:41,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:41,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607119197] [2022-03-19 01:13:41,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 01:13:41,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:41,752 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:13:41,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 01:13:42,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 01:13:42,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:13:42,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 01:13:42,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 01:13:42,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:42,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:42,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636731468] [2022-03-19 01:13:42,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:42,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607119197] [2022-03-19 01:13:42,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607119197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:13:42,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:13:42,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 01:13:42,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684970134] [2022-03-19 01:13:42,426 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:42,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 01:13:42,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:42,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 01:13:42,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-19 01:13:42,426 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 01:13:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:42,531 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-03-19 01:13:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 01:13:42,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2022-03-19 01:13:42,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:42,548 INFO L225 Difference]: With dead ends: 98 [2022-03-19 01:13:42,548 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 01:13:42,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-19 01:13:42,549 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:42,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 372 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:13:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 01:13:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-19 01:13:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 01:13:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-03-19 01:13:42,559 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 66 [2022-03-19 01:13:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:42,559 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-03-19 01:13:42,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 01:13:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-03-19 01:13:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 01:13:42,560 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:42,560 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:42,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:42,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 01:13:42,760 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash 291122568, now seen corresponding path program 7 times [2022-03-19 01:13:42,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:42,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132118837] [2022-03-19 01:13:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:42,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:42,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415630242] [2022-03-19 01:13:42,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 01:13:42,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:42,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:42,769 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) [2022-03-19 01:13:42,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 01:13:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:13:43,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 01:13:43,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 01:13:43,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:44,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132118837] [2022-03-19 01:13:44,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415630242] [2022-03-19 01:13:44,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415630242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:13:44,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:13:44,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 01:13:44,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313604723] [2022-03-19 01:13:44,160 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:44,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 01:13:44,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:44,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 01:13:44,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-19 01:13:44,161 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 01:13:44,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:44,294 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-03-19 01:13:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 01:13:44,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2022-03-19 01:13:44,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:44,295 INFO L225 Difference]: With dead ends: 98 [2022-03-19 01:13:44,295 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 01:13:44,295 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-19 01:13:44,296 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:44,296 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 442 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:13:44,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 01:13:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-19 01:13:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 01:13:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-03-19 01:13:44,301 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 74 [2022-03-19 01:13:44,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:44,301 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-03-19 01:13:44,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 01:13:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-03-19 01:13:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 01:13:44,302 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:44,302 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:44,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:44,502 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 [2022-03-19 01:13:44,502 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:44,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1938494313, now seen corresponding path program 8 times [2022-03-19 01:13:44,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:44,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068715055] [2022-03-19 01:13:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:44,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:44,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:44,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959882966] [2022-03-19 01:13:44,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 01:13:44,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:44,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:44,520 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) [2022-03-19 01:13:44,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 01:13:45,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 01:13:45,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:13:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 01:13:45,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 01:13:45,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:45,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:45,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068715055] [2022-03-19 01:13:45,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:45,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959882966] [2022-03-19 01:13:45,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959882966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:13:45,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:13:45,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 01:13:45,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129717635] [2022-03-19 01:13:45,470 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:45,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 01:13:45,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:45,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 01:13:45,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-19 01:13:45,471 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 01:13:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:45,624 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2022-03-19 01:13:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 01:13:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2022-03-19 01:13:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:45,625 INFO L225 Difference]: With dead ends: 98 [2022-03-19 01:13:45,625 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 01:13:45,625 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-19 01:13:45,626 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:45,626 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 518 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:13:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 01:13:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-19 01:13:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 01:13:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-03-19 01:13:45,633 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 82 [2022-03-19 01:13:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:45,633 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-03-19 01:13:45,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 01:13:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-03-19 01:13:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-19 01:13:45,634 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:45,634 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:45,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:45,834 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 [2022-03-19 01:13:45,835 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:45,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:45,835 INFO L85 PathProgramCache]: Analyzing trace with hash 757893194, now seen corresponding path program 9 times [2022-03-19 01:13:45,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:45,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190749572] [2022-03-19 01:13:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:45,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:45,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:45,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774245947] [2022-03-19 01:13:45,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 01:13:45,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:45,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:45,843 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) [2022-03-19 01:13:45,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 01:13:46,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-19 01:13:46,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:13:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 01:13:46,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:13:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 01:13:46,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:13:46,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:13:46,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190749572] [2022-03-19 01:13:46,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:13:46,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774245947] [2022-03-19 01:13:46,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774245947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:13:46,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:13:46,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 01:13:46,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428093315] [2022-03-19 01:13:46,646 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:13:46,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 01:13:46,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:13:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 01:13:46,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-19 01:13:46,647 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 01:13:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:13:46,830 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-03-19 01:13:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 01:13:46,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2022-03-19 01:13:46,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:13:46,831 INFO L225 Difference]: With dead ends: 100 [2022-03-19 01:13:46,831 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 01:13:46,831 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-19 01:13:46,832 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 2 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 01:13:46,832 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 600 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 01:13:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 01:13:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-19 01:13:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 01:13:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-03-19 01:13:46,839 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2022-03-19 01:13:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:13:46,840 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-03-19 01:13:46,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 01:13:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-03-19 01:13:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 01:13:46,841 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:13:46,841 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:13:46,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-19 01:13:47,046 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 [2022-03-19 01:13:47,047 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:13:47,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:13:47,047 INFO L85 PathProgramCache]: Analyzing trace with hash -953190739, now seen corresponding path program 3 times [2022-03-19 01:13:47,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:13:47,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882505780] [2022-03-19 01:13:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:13:47,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:13:47,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:13:47,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059496301] [2022-03-19 01:13:47,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 01:13:47,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:13:47,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:13:47,058 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) [2022-03-19 01:13:47,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 01:13:47,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-19 01:13:47,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-19 01:13:47,611 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 01:13:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 01:13:47,685 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 01:13:47,685 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 01:13:47,685 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 01:13:47,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 01:13:47,902 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 [2022-03-19 01:13:47,905 INFO L718 BasicCegarLoop]: Path program histogram: [9, 3, 1, 1, 1, 1] [2022-03-19 01:13:47,907 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 01:13:47,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 01:13:47 BasicIcfg [2022-03-19 01:13:47,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 01:13:47,941 INFO L158 Benchmark]: Toolchain (without parser) took 19855.67ms. Allocated memory was 221.2MB in the beginning and 319.8MB in the end (delta: 98.6MB). Free memory was 196.4MB in the beginning and 226.3MB in the end (delta: -29.9MB). Peak memory consumption was 67.8MB. Max. memory is 8.0GB. [2022-03-19 01:13:47,941 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 221.2MB. Free memory is still 183.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 01:13:47,942 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.69ms. Allocated memory is still 221.2MB. Free memory was 196.2MB in the beginning and 194.4MB in the end (delta: 1.7MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-03-19 01:13:47,942 INFO L158 Benchmark]: Boogie Preprocessor took 29.69ms. Allocated memory is still 221.2MB. Free memory was 194.4MB in the beginning and 193.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 01:13:47,942 INFO L158 Benchmark]: RCFGBuilder took 294.05ms. Allocated memory is still 221.2MB. Free memory was 192.8MB in the beginning and 183.1MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-19 01:13:47,943 INFO L158 Benchmark]: IcfgTransformer took 28.43ms. Allocated memory is still 221.2MB. Free memory was 183.1MB in the beginning and 181.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 01:13:47,943 INFO L158 Benchmark]: TraceAbstraction took 19275.79ms. Allocated memory was 221.2MB in the beginning and 319.8MB in the end (delta: 98.6MB). Free memory was 181.3MB in the beginning and 226.3MB in the end (delta: -45.0MB). Peak memory consumption was 54.1MB. Max. memory is 8.0GB. [2022-03-19 01:13:47,944 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 221.2MB. Free memory is still 183.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 209.69ms. Allocated memory is still 221.2MB. Free memory was 196.2MB in the beginning and 194.4MB in the end (delta: 1.7MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.69ms. Allocated memory is still 221.2MB. Free memory was 194.4MB in the beginning and 193.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 294.05ms. Allocated memory is still 221.2MB. Free memory was 192.8MB in the beginning and 183.1MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 28.43ms. Allocated memory is still 221.2MB. Free memory was 183.1MB in the beginning and 181.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 19275.79ms. Allocated memory was 221.2MB in the beginning and 319.8MB in the end (delta: 98.6MB). Free memory was 181.3MB in the beginning and 226.3MB in the end (delta: -45.0MB). Peak memory consumption was 54.1MB. 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: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=13, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=11, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=11, x=0, y=0] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=11, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=11, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=11, x=1, y=1] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=1, counter=2, k=11, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=11, x=9, y=2] [L27] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=11, x=9, y=2] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=2, counter=3, k=11, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=3, counter=3, k=11, x=36, y=3] [L27] EXPR counter++ VAL [\old(counter)=0, c=3, counter=4, counter++=3, k=11, x=36, y=3] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=3, counter=4, k=11, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=4, counter=4, k=11, x=100, y=4] [L27] EXPR counter++ VAL [\old(counter)=0, c=4, counter=5, counter++=4, k=11, x=100, y=4] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=4, counter=5, k=11, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=5, counter=5, k=11, x=225, y=5] [L27] EXPR counter++ VAL [\old(counter)=0, c=5, counter=6, counter++=5, k=11, x=225, y=5] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=5, counter=6, k=11, x=225, y=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=6, counter=6, k=11, x=441, y=6] [L27] EXPR counter++ VAL [\old(counter)=0, c=6, counter=7, counter++=6, k=11, x=441, y=6] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=6, counter=7, k=11, x=441, y=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=7, counter=7, k=11, x=784, y=7] [L27] EXPR counter++ VAL [\old(counter)=0, c=7, counter=8, counter++=7, k=11, x=784, y=7] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=7, counter=8, k=11, x=784, y=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=8, counter=8, k=11, x=1296, y=8] [L27] EXPR counter++ VAL [\old(counter)=0, c=8, counter=9, counter++=8, k=11, x=1296, y=8] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=8, counter=9, k=11, x=1296, y=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=9, counter=9, k=11, x=2025, y=9] [L27] EXPR counter++ VAL [\old(counter)=0, c=9, counter=10, counter++=9, k=11, x=2025, y=9] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=9, counter=10, k=11, x=2025, y=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=10, counter=10, k=11, x=3025, y=10] [L27] EXPR counter++ VAL [\old(counter)=0, c=10, counter=11, counter++=10, k=11, x=3025, y=10] [L27] COND FALSE !(counter++<10) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.2s, OverallIterations: 16, TraceHistogramMax: 11, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 168 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 164 mSDsluCounter, 3421 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2954 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1447 IncrementalHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 467 mSDtfsCounter, 1447 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 935 GetRequests, 740 SyntacticMatches, 11 SemanticMatches, 184 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=15, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 36 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 733 NumberOfCodeBlocks, 733 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 707 ConstructedInterpolants, 0 QuantifiedInterpolants, 3133 SizeOfPredicates, 30 NumberOfNonLiveVariables, 2155 ConjunctsInSsa, 304 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 818/1574 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-19 01:13:47,971 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...