/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/prodbin-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 08:58:53,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 08:58:53,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 08:58:53,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 08:58:53,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 08:58:53,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 08:58:53,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 08:58:53,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 08:58:53,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 08:58:53,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 08:58:53,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 08:58:53,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 08:58:53,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 08:58:53,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 08:58:53,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 08:58:53,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 08:58:53,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 08:58:53,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 08:58:53,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 08:58:53,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 08:58:53,274 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 08:58:53,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 08:58:53,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 08:58:53,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 08:58:53,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 08:58:53,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 08:58:53,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 08:58:53,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 08:58:53,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 08:58:53,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 08:58:53,314 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 08:58:53,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 08:58:53,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 08:58:53,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 08:58:53,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 08:58:53,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 08:58:53,316 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 08:58:53,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 08:58:53,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 08:58:53,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 08:58:53,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 08:58:53,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 08:58:53,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 08:58:53,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 08:58:53,318 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 08:58:53,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 08:58:53,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 08:58:53,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 08:58:53,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 08:58:53,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:58:53,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 08:58:53,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 08:58:53,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 08:58:53,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 08:58:53,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 08:58:53,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 08:58:53,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 08:58:53,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 08:58:53,321 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 08:58:53,321 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 08:58:53,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 08:58:53,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 08:58:53,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 08:58:53,562 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 08:58:53,562 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 08:58:53,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2022-04-05 08:58:53,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13bf3713c/5c4510ba5a214ec493f7798d89656494/FLAG3af88bda7 [2022-04-05 08:58:53,994 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 08:58:53,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2022-04-05 08:58:54,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13bf3713c/5c4510ba5a214ec493f7798d89656494/FLAG3af88bda7 [2022-04-05 08:58:54,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13bf3713c/5c4510ba5a214ec493f7798d89656494 [2022-04-05 08:58:54,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 08:58:54,417 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 08:58:54,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 08:58:54,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 08:58:54,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 08:58:54,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5ae672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54, skipping insertion in model container [2022-04-05 08:58:54,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 08:58:54,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 08:58:54,615 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/prodbin-ll_unwindbound20.c[537,550] [2022-04-05 08:58:54,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:58:54,640 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 08:58:54,651 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/prodbin-ll_unwindbound20.c[537,550] [2022-04-05 08:58:54,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:58:54,677 INFO L208 MainTranslator]: Completed translation [2022-04-05 08:58:54,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54 WrapperNode [2022-04-05 08:58:54,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 08:58:54,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 08:58:54,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 08:58:54,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 08:58:54,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 08:58:54,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 08:58:54,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 08:58:54,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 08:58:54,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:58:54,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:58:54,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 08:58:54,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 08:58:54,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 08:58:54,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 08:58:54,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 08:58:54,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 08:58:54,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 08:58:54,774 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 08:58:54,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 08:58:54,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 08:58:54,775 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 08:58:54,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 08:58:54,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 08:58:54,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 08:58:54,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 08:58:54,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 08:58:54,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 08:58:54,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 08:58:54,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 08:58:54,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 08:58:54,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 08:58:54,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 08:58:54,831 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 08:58:54,833 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 08:58:54,968 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 08:58:54,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 08:58:54,973 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 08:58:54,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:58:54 BoogieIcfgContainer [2022-04-05 08:58:54,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 08:58:54,989 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 08:58:54,989 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 08:58:54,990 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 08:58:54,993 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:58:54" (1/1) ... [2022-04-05 08:58:54,995 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 08:58:55,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:58:55 BasicIcfg [2022-04-05 08:58:55,017 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 08:58:55,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 08:58:55,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 08:58:55,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 08:58:55,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 08:58:54" (1/4) ... [2022-04-05 08:58:55,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fae1c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:58:55, skipping insertion in model container [2022-04-05 08:58:55,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:58:54" (2/4) ... [2022-04-05 08:58:55,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fae1c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:58:55, skipping insertion in model container [2022-04-05 08:58:55,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:58:54" (3/4) ... [2022-04-05 08:58:55,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fae1c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 08:58:55, skipping insertion in model container [2022-04-05 08:58:55,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:58:55" (4/4) ... [2022-04-05 08:58:55,028 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound20.cqvasr [2022-04-05 08:58:55,032 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 08:58:55,032 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 08:58:55,067 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 08:58:55,072 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 08:58:55,072 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 08:58:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 08:58:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 08:58:55,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:58:55,090 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:58:55,090 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:58:55,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:58:55,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2022-04-05 08:58:55,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:58:55,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711529152] [2022-04-05 08:58:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:55,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:58:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:58:55,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 08:58:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:58:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 08:58:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:58:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:58:55,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:58:55,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711529152] [2022-04-05 08:58:55,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711529152] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:58:55,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:58:55,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 08:58:55,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178969879] [2022-04-05 08:58:55,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:58:55,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 08:58:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:58:55,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 08:58:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:58:55,345 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:58:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:58:55,416 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-05 08:58:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 08:58:55,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 08:58:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:58:55,424 INFO L225 Difference]: With dead ends: 52 [2022-04-05 08:58:55,424 INFO L226 Difference]: Without dead ends: 26 [2022-04-05 08:58:55,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:58:55,432 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:58:55,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:58:55,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-05 08:58:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-05 08:58:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 08:58:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-05 08:58:55,457 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-04-05 08:58:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:58:55,457 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-05 08:58:55,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:58:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-05 08:58:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 08:58:55,458 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:58:55,459 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:58:55,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 08:58:55,459 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:58:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:58:55,460 INFO L85 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2022-04-05 08:58:55,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:58:55,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488913468] [2022-04-05 08:58:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:55,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:58:55,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:58:55,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576431217] [2022-04-05 08:58:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:55,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:58:55,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:58:55,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:58:55,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 08:58:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:58:55,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 08:58:55,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:58:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:58:55,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:58:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:58:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488913468] [2022-04-05 08:58:55,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:58:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576431217] [2022-04-05 08:58:55,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576431217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:58:55,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:58:55,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 08:58:55,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600377193] [2022-04-05 08:58:55,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:58:55,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 08:58:55,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:58:55,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 08:58:55,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 08:58:55,606 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 08:58:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:58:55,617 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-05 08:58:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 08:58:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-05 08:58:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:58:55,618 INFO L225 Difference]: With dead ends: 34 [2022-04-05 08:58:55,618 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 08:58:55,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 08:58:55,620 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 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 [2022-04-05 08:58:55,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:58:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 08:58:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-05 08:58:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 08:58:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-05 08:58:55,626 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-04-05 08:58:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:58:55,626 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-05 08:58:55,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 08:58:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-05 08:58:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 08:58:55,627 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:58:55,627 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:58:55,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 08:58:55,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:58:55,844 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:58:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:58:55,844 INFO L85 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2022-04-05 08:58:55,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:58:55,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333420982] [2022-04-05 08:58:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:55,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:58:55,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:58:55,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682307635] [2022-04-05 08:58:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:55,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:58:55,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:58:55,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:58:55,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 08:58:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:58:55,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 08:58:55,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:58:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:58:55,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:58:56,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:58:56,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333420982] [2022-04-05 08:58:56,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:58:56,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682307635] [2022-04-05 08:58:56,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682307635] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:58:56,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:58:56,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 08:58:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84063525] [2022-04-05 08:58:56,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:58:56,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 08:58:56,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:58:56,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 08:58:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:58:56,007 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:58:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:58:56,051 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-04-05 08:58:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:58:56,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-05 08:58:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:58:56,052 INFO L225 Difference]: With dead ends: 38 [2022-04-05 08:58:56,052 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 08:58:56,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:58:56,054 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:58:56,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:58:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 08:58:56,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-04-05 08:58:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 08:58:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-05 08:58:56,061 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-04-05 08:58:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:58:56,061 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-05 08:58:56,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:58:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-05 08:58:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 08:58:56,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:58:56,062 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:58:56,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 08:58:56,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 08:58:56,290 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:58:56,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:58:56,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2022-04-05 08:58:56,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:58:56,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333773941] [2022-04-05 08:58:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:56,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:58:56,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:58:56,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311461978] [2022-04-05 08:58:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:56,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:58:56,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:58:56,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:58:56,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 08:58:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:58:56,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:58:56,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:58:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:58:56,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:58:56,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:58:56,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333773941] [2022-04-05 08:58:56,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:58:56,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311461978] [2022-04-05 08:58:56,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311461978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:58:56,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:58:56,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 08:58:56,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109848681] [2022-04-05 08:58:56,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:58:56,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:58:56,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:58:56,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:58:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:58:56,460 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 08:58:56,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:58:56,509 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-05 08:58:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 08:58:56,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-05 08:58:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:58:56,510 INFO L225 Difference]: With dead ends: 42 [2022-04-05 08:58:56,510 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 08:58:56,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 08:58:56,512 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:58:56,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:58:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 08:58:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-04-05 08:58:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 08:58:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-05 08:58:56,519 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-04-05 08:58:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:58:56,519 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-05 08:58:56,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 08:58:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-05 08:58:56,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:58:56,520 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:58:56,520 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:58:56,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 08:58:56,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:58:56,736 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:58:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:58:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2022-04-05 08:58:56,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:58:56,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335560278] [2022-04-05 08:58:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:56,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:58:56,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:58:56,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992912310] [2022-04-05 08:58:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:56,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:58:56,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:58:56,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:58:56,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 08:58:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:58:56,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:58:56,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:58:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:58:56,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:58:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:58:57,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:58:57,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335560278] [2022-04-05 08:58:57,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:58:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992912310] [2022-04-05 08:58:57,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992912310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:58:57,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:58:57,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 08:58:57,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252930179] [2022-04-05 08:58:57,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:58:57,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 08:58:57,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:58:57,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 08:58:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 08:58:57,031 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 08:58:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:58:57,107 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-04-05 08:58:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 08:58:57,108 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-04-05 08:58:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:58:57,111 INFO L225 Difference]: With dead ends: 70 [2022-04-05 08:58:57,111 INFO L226 Difference]: Without dead ends: 63 [2022-04-05 08:58:57,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-05 08:58:57,112 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:58:57,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:58:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-05 08:58:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-04-05 08:58:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 08:58:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-04-05 08:58:57,122 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-04-05 08:58:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:58:57,122 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-04-05 08:58:57,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 08:58:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-04-05 08:58:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:58:57,123 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:58:57,124 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:58:57,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-05 08:58:57,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:58:57,339 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:58:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:58:57,340 INFO L85 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2022-04-05 08:58:57,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:58:57,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037999221] [2022-04-05 08:58:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:57,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:58:57,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:58:57,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609751463] [2022-04-05 08:58:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:58:57,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:58:57,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:58:57,353 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:58:57,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 08:58:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:58:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 08:58:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:58:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:58:59,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:09,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:09,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037999221] [2022-04-05 08:59:09,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:09,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609751463] [2022-04-05 08:59:09,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609751463] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:09,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:09,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-05 08:59:09,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29595901] [2022-04-05 08:59:09,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:09,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 08:59:09,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:09,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 08:59:09,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-05 08:59:09,470 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 08:59:11,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:13,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:19,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:21,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:21,233 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2022-04-05 08:59:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 08:59:21,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-05 08:59:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:21,236 INFO L225 Difference]: With dead ends: 94 [2022-04-05 08:59:21,236 INFO L226 Difference]: Without dead ends: 92 [2022-04-05 08:59:21,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-04-05 08:59:21,238 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:21,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 156 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-04-05 08:59:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-05 08:59:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2022-04-05 08:59:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 69 states have internal predecessors, (75), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 08:59:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2022-04-05 08:59:21,252 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 28 [2022-04-05 08:59:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:21,252 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2022-04-05 08:59:21,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 08:59:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2022-04-05 08:59:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:59:21,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:21,253 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:21,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:21,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:21,468 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:21,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:21,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2022-04-05 08:59:21,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:21,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565891827] [2022-04-05 08:59:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:21,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:21,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:21,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68080192] [2022-04-05 08:59:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:21,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:21,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:21,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 08:59:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:21,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 08:59:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:22,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:23,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565891827] [2022-04-05 08:59:23,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68080192] [2022-04-05 08:59:23,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68080192] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:23,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:23,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-04-05 08:59:23,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279024848] [2022-04-05 08:59:23,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:23,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 08:59:23,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:23,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 08:59:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-04-05 08:59:23,204 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 08:59:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:24,538 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2022-04-05 08:59:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 08:59:24,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-04-05 08:59:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:24,540 INFO L225 Difference]: With dead ends: 119 [2022-04-05 08:59:24,540 INFO L226 Difference]: Without dead ends: 110 [2022-04-05 08:59:24,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-04-05 08:59:24,542 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:24,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 171 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 08:59:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-05 08:59:24,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2022-04-05 08:59:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 79 states have internal predecessors, (89), 14 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 08:59:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2022-04-05 08:59:24,556 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 28 [2022-04-05 08:59:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:24,556 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2022-04-05 08:59:24,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 08:59:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2022-04-05 08:59:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 08:59:24,557 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:24,557 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:24,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-05 08:59:24,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:24,780 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2022-04-05 08:59:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:24,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689576102] [2022-04-05 08:59:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:24,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:24,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:24,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375613944] [2022-04-05 08:59:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:24,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:24,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:24,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:24,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 08:59:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:24,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 08:59:24,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 08:59:24,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 08:59:25,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:25,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689576102] [2022-04-05 08:59:25,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:25,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375613944] [2022-04-05 08:59:25,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375613944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:25,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:25,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-05 08:59:25,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730782366] [2022-04-05 08:59:25,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:25,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 08:59:25,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 08:59:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 08:59:25,041 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 08:59:27,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:29,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:29,134 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2022-04-05 08:59:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 08:59:29,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-05 08:59:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:29,136 INFO L225 Difference]: With dead ends: 112 [2022-04-05 08:59:29,136 INFO L226 Difference]: Without dead ends: 97 [2022-04-05 08:59:29,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-05 08:59:29,137 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:29,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 106 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2022-04-05 08:59:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-05 08:59:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-04-05 08:59:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 76 states have internal predecessors, (83), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 08:59:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2022-04-05 08:59:29,147 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 34 [2022-04-05 08:59:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:29,147 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2022-04-05 08:59:29,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 08:59:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2022-04-05 08:59:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 08:59:29,148 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:29,148 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:29,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:29,369 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:29,370 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:29,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:29,370 INFO L85 PathProgramCache]: Analyzing trace with hash 960980470, now seen corresponding path program 1 times [2022-04-05 08:59:29,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:29,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176339269] [2022-04-05 08:59:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:29,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:29,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:29,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412112659] [2022-04-05 08:59:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:29,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:29,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:29,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:29,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 08:59:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:29,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-05 08:59:29,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 08:59:32,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 08:59:33,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:33,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176339269] [2022-04-05 08:59:33,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:33,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412112659] [2022-04-05 08:59:33,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412112659] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:33,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:33,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-04-05 08:59:33,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475474797] [2022-04-05 08:59:33,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:33,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 08:59:33,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:33,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 08:59:33,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-04-05 08:59:33,650 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 08:59:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:35,007 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2022-04-05 08:59:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 08:59:35,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2022-04-05 08:59:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:35,009 INFO L225 Difference]: With dead ends: 118 [2022-04-05 08:59:35,009 INFO L226 Difference]: Without dead ends: 116 [2022-04-05 08:59:35,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-04-05 08:59:35,010 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:35,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 172 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 166 Invalid, 0 Unknown, 24 Unchecked, 0.5s Time] [2022-04-05 08:59:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-05 08:59:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 78. [2022-04-05 08:59:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.152542372881356) internal successors, (68), 61 states have internal predecessors, (68), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 08:59:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-04-05 08:59:35,036 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 38 [2022-04-05 08:59:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:35,036 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-04-05 08:59:35,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 08:59:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-04-05 08:59:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 08:59:35,038 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:35,038 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:35,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:35,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 08:59:35,250 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:35,250 INFO L85 PathProgramCache]: Analyzing trace with hash -831185954, now seen corresponding path program 2 times [2022-04-05 08:59:35,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:35,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858653857] [2022-04-05 08:59:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:35,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:35,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:35,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857705986] [2022-04-05 08:59:35,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 08:59:35,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:35,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:35,266 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:35,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 08:59:35,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 08:59:35,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 08:59:35,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 08:59:35,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:35,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 08:59:35,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:35,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858653857] [2022-04-05 08:59:35,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:35,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857705986] [2022-04-05 08:59:35,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857705986] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:35,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:35,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-05 08:59:35,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781031041] [2022-04-05 08:59:35,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:35,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 08:59:35,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:35,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 08:59:35,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-05 08:59:35,600 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-05 08:59:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:35,743 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2022-04-05 08:59:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 08:59:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 58 [2022-04-05 08:59:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:35,745 INFO L225 Difference]: With dead ends: 258 [2022-04-05 08:59:35,745 INFO L226 Difference]: Without dead ends: 251 [2022-04-05 08:59:35,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-04-05 08:59:35,747 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 137 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:35,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 162 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:59:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-05 08:59:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 241. [2022-04-05 08:59:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 188 states have (on average 1.1382978723404256) internal successors, (214), 195 states have internal predecessors, (214), 27 states have call successors, (27), 26 states have call predecessors, (27), 25 states have return successors, (25), 19 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-05 08:59:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2022-04-05 08:59:35,766 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 58 [2022-04-05 08:59:35,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:35,766 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2022-04-05 08:59:35,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-05 08:59:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2022-04-05 08:59:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 08:59:35,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:35,768 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:35,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:35,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 08:59:35,986 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:35,986 INFO L85 PathProgramCache]: Analyzing trace with hash -84345705, now seen corresponding path program 2 times [2022-04-05 08:59:35,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:35,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855100142] [2022-04-05 08:59:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:35,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:35,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:35,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300488336] [2022-04-05 08:59:35,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 08:59:35,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:35,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:36,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:36,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 08:59:36,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 08:59:36,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 08:59:36,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-05 08:59:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:00:19,181 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:00:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 09:00:21,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:00:33,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:00:33,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855100142] [2022-04-05 09:00:33,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:00:33,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300488336] [2022-04-05 09:00:33,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300488336] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:00:33,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:00:33,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-05 09:00:33,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015785641] [2022-04-05 09:00:33,976 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:00:33,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 09:00:33,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:00:33,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 09:00:33,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=614, Unknown=2, NotChecked=0, Total=756 [2022-04-05 09:00:33,977 INFO L87 Difference]: Start difference. First operand 241 states and 266 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 09:00:35,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:00:38,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:00:40,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:00:42,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:00:44,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:00:48,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:00:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:00:50,853 INFO L93 Difference]: Finished difference Result 279 states and 310 transitions. [2022-04-05 09:00:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-05 09:00:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2022-04-05 09:00:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:00:50,857 INFO L225 Difference]: With dead ends: 279 [2022-04-05 09:00:50,857 INFO L226 Difference]: Without dead ends: 277 [2022-04-05 09:00:50,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=157, Invalid=771, Unknown=2, NotChecked=0, Total=930 [2022-04-05 09:00:50,858 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 45 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2022-04-05 09:00:50,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 266 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 521 Invalid, 4 Unknown, 0 Unchecked, 16.6s Time] [2022-04-05 09:00:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-05 09:00:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 253. [2022-04-05 09:00:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 198 states have (on average 1.1414141414141414) internal successors, (226), 205 states have internal predecessors, (226), 29 states have call successors, (29), 26 states have call predecessors, (29), 25 states have return successors, (27), 21 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-05 09:00:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 282 transitions. [2022-04-05 09:00:50,884 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 282 transitions. Word has length 58 [2022-04-05 09:00:50,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:00:50,884 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 282 transitions. [2022-04-05 09:00:50,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 09:00:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 282 transitions. [2022-04-05 09:00:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 09:00:50,886 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:00:50,887 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:00:50,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 09:00:51,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 09:00:51,107 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:00:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:00:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash -339082250, now seen corresponding path program 3 times [2022-04-05 09:00:51,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:00:51,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850024700] [2022-04-05 09:00:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:00:51,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:00:51,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:00:51,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785708775] [2022-04-05 09:00:51,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:00:51,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:00:51,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:00:51,120 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:00:51,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 09:00:51,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 09:00:51,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:00:51,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 09:00:51,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:00:51,706 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:00:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 09:00:52,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:00:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 34 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 09:00:54,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:00:54,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850024700] [2022-04-05 09:00:54,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:00:54,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785708775] [2022-04-05 09:00:54,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785708775] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:00:54,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:00:54,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 32 [2022-04-05 09:00:54,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583677461] [2022-04-05 09:00:54,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:00:54,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 09:00:54,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:00:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 09:00:54,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2022-04-05 09:00:54,377 INFO L87 Difference]: Start difference. First operand 253 states and 282 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-04-05 09:00:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:00:57,780 INFO L93 Difference]: Finished difference Result 279 states and 313 transitions. [2022-04-05 09:00:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 09:00:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 58 [2022-04-05 09:00:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:00:57,782 INFO L225 Difference]: With dead ends: 279 [2022-04-05 09:00:57,782 INFO L226 Difference]: Without dead ends: 275 [2022-04-05 09:00:57,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=514, Invalid=1936, Unknown=0, NotChecked=0, Total=2450 [2022-04-05 09:00:57,783 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 09:00:57,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 216 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 334 Invalid, 0 Unknown, 3 Unchecked, 0.7s Time] [2022-04-05 09:00:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-05 09:00:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 119. [2022-04-05 09:00:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 09:00:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2022-04-05 09:00:57,794 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 58 [2022-04-05 09:00:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:00:57,795 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2022-04-05 09:00:57,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-04-05 09:00:57,795 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2022-04-05 09:00:57,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-05 09:00:57,796 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:00:57,796 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:00:57,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 09:00:58,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 09:00:58,003 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:00:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:00:58,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2092549276, now seen corresponding path program 3 times [2022-04-05 09:00:58,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:00:58,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240003766] [2022-04-05 09:00:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:00:58,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:00:58,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:00:58,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012674171] [2022-04-05 09:00:58,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:00:58,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:00:58,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:00:58,031 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:00:58,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 09:00:58,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-04-05 09:00:58,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:00:58,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 09:00:58,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:00:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:00:58,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:00:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-05 09:00:58,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:00:58,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240003766] [2022-04-05 09:00:58,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:00:58,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012674171] [2022-04-05 09:00:58,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012674171] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:00:58,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:00:58,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-05 09:00:58,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181440567] [2022-04-05 09:00:58,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:00:58,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 09:00:58,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:00:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 09:00:58,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 09:00:58,744 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 24 states have internal predecessors, (149), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-04-05 09:00:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:00:59,030 INFO L93 Difference]: Finished difference Result 224 states and 253 transitions. [2022-04-05 09:00:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 09:00:59,031 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 24 states have internal predecessors, (149), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 118 [2022-04-05 09:00:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:00:59,032 INFO L225 Difference]: With dead ends: 224 [2022-04-05 09:00:59,032 INFO L226 Difference]: Without dead ends: 219 [2022-04-05 09:00:59,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 09:00:59,033 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 184 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:00:59,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 307 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:00:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-05 09:00:59,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-04-05 09:00:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 172 states have (on average 1.122093023255814) internal successors, (193), 172 states have internal predecessors, (193), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-05 09:00:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 239 transitions. [2022-04-05 09:00:59,047 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 239 transitions. Word has length 118 [2022-04-05 09:00:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:00:59,048 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 239 transitions. [2022-04-05 09:00:59,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 24 states have internal predecessors, (149), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-04-05 09:00:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 239 transitions. [2022-04-05 09:00:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-04-05 09:00:59,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:00:59,050 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:00:59,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 09:00:59,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 09:00:59,255 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:00:59,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:00:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1431096302, now seen corresponding path program 4 times [2022-04-05 09:00:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:00:59,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688386082] [2022-04-05 09:00:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:00:59,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:00:59,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:00:59,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317075399] [2022-04-05 09:00:59,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 09:00:59,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:00:59,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:00:59,290 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:00:59,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 09:01:09,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 09:01:09,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-05 09:01:09,911 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-05 09:01:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-05 09:01:10,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-05 09:01:10,395 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-05 09:01:10,396 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 09:01:10,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 09:01:10,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 09:01:10,600 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:01:10,602 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 09:01:10,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 09:01:10 BasicIcfg [2022-04-05 09:01:10,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 09:01:10,679 INFO L158 Benchmark]: Toolchain (without parser) took 136262.35ms. Allocated memory was 207.6MB in the beginning and 300.9MB in the end (delta: 93.3MB). Free memory was 155.7MB in the beginning and 243.3MB in the end (delta: -87.5MB). Peak memory consumption was 6.5MB. Max. memory is 8.0GB. [2022-04-05 09:01:10,679 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 207.6MB. Free memory was 172.2MB in the beginning and 172.1MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 09:01:10,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.01ms. Allocated memory is still 207.6MB. Free memory was 155.6MB in the beginning and 184.5MB in the end (delta: -28.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 09:01:10,683 INFO L158 Benchmark]: Boogie Preprocessor took 32.51ms. Allocated memory is still 207.6MB. Free memory was 184.5MB in the beginning and 183.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 09:01:10,684 INFO L158 Benchmark]: RCFGBuilder took 275.42ms. Allocated memory is still 207.6MB. Free memory was 183.0MB in the beginning and 172.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 09:01:10,684 INFO L158 Benchmark]: IcfgTransformer took 28.13ms. Allocated memory is still 207.6MB. Free memory was 172.5MB in the beginning and 171.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 09:01:10,684 INFO L158 Benchmark]: TraceAbstraction took 135659.91ms. Allocated memory was 207.6MB in the beginning and 300.9MB in the end (delta: 93.3MB). Free memory was 171.1MB in the beginning and 243.3MB in the end (delta: -72.2MB). Peak memory consumption was 22.5MB. Max. memory is 8.0GB. [2022-04-05 09:01:10,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 207.6MB. Free memory was 172.2MB in the beginning and 172.1MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 261.01ms. Allocated memory is still 207.6MB. Free memory was 155.6MB in the beginning and 184.5MB in the end (delta: -28.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.51ms. Allocated memory is still 207.6MB. Free memory was 184.5MB in the beginning and 183.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 275.42ms. Allocated memory is still 207.6MB. Free memory was 183.0MB in the beginning and 172.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 28.13ms. Allocated memory is still 207.6MB. Free memory was 172.5MB in the beginning and 171.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 135659.91ms. Allocated memory was 207.6MB in the beginning and 300.9MB in the end (delta: 93.3MB). Free memory was 171.1MB in the beginning and 243.3MB in the end (delta: -72.2MB). Peak memory consumption was 22.5MB. 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [\old(counter)=22, counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) VAL [\old(counter)=0, a=-5, b=2097151, counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [\old(counter)=0, a=-5, b=2097151, counter=0, x=-5, y=2097151, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=1, counter++=0, x=-5, y=2097151, z=0] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=1, x=-5, y=2097151, z=0] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=1, x=-5, y=2097151, z=0] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=1, x=-5, y=2097150, z=-5] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=1, x=-10, y=1048575, z=-5] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=2, counter++=1, x=-10, y=1048575, z=-5] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=2, x=-10, y=1048575, z=-5] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=2, x=-10, y=1048575, z=-5] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=2, x=-10, y=1048574, z=-15] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=2, x=-20, y=524287, z=-15] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=3, counter++=2, x=-20, y=524287, z=-15] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=3, x=-20, y=524287, z=-15] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=3, x=-20, y=524287, z=-15] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=3, x=-20, y=524286, z=-35] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=3, x=-40, y=262143, z=-35] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=4, counter++=3, x=-40, y=262143, z=-35] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=4, x=-40, y=262143, z=-35] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=4, x=-40, y=262143, z=-35] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=4, x=-40, y=262142, z=-75] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=4, x=-80, y=131071, z=-75] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=5, counter++=4, x=-80, y=131071, z=-75] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=5, x=-80, y=131071, z=-75] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=5, x=-80, y=131071, z=-75] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=5, x=-80, y=131070, z=-155] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=5, x=-160, y=65535, z=-155] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=6, counter++=5, x=-160, y=65535, z=-155] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=6, x=-160, y=65535, z=-155] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=6, x=-160, y=65535, z=-155] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=6, x=-160, y=65534, z=-315] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=6, x=-320, y=32767, z=-315] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=7, counter++=6, x=-320, y=32767, z=-315] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=7, x=-320, y=32767, z=-315] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=7, x=-320, y=32767, z=-315] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=7, x=-320, y=32766, z=-635] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=7, x=-640, y=16383, z=-635] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=8, counter++=7, x=-640, y=16383, z=-635] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=8, x=-640, y=16383, z=-635] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=8, x=-640, y=16383, z=-635] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=8, x=-640, y=16382, z=-1275] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=8, x=-1280, y=8191, z=-1275] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=9, counter++=8, x=-1280, y=8191, z=-1275] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=9, x=-1280, y=8191, z=-1275] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=9, x=-1280, y=8191, z=-1275] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=9, x=-1280, y=8190, z=-2555] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=9, x=-2560, y=4095, z=-2555] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=10, counter++=9, x=-2560, y=4095, z=-2555] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=10, x=-2560, y=4095, z=-2555] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=10, x=-2560, y=4095, z=-2555] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=10, x=-2560, y=4094, z=-5115] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=10, x=-5120, y=2047, z=-5115] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=11, counter++=10, x=-5120, y=2047, z=-5115] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=11] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=11] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=11, x=-5120, y=2047, z=-5115] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=11, x=-5120, y=2047, z=-5115] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=11, x=-5120, y=2046, z=-10235] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=11, x=-10240, y=1023, z=-10235] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=12, counter++=11, x=-10240, y=1023, z=-10235] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=12] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=12] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=12, x=-10240, y=1023, z=-10235] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=12, x=-10240, y=1023, z=-10235] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=12, x=-10240, y=1022, z=-20475] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=12, x=-20480, y=511, z=-20475] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=13, counter++=12, x=-20480, y=511, z=-20475] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=13, x=-20480, y=511, z=-20475] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=13, x=-20480, y=511, z=-20475] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=13, x=-20480, y=510, z=-40955] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=13, x=-40960, y=255, z=-40955] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=14, counter++=13, x=-40960, y=255, z=-40955] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=14] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=14] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=14, x=-40960, y=255, z=-40955] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=14, x=-40960, y=255, z=-40955] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=14, x=-40960, y=254, z=-81915] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=14, x=-81920, y=127, z=-81915] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=15, counter++=14, x=-81920, y=127, z=-81915] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=15] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=15] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=15, x=-81920, y=127, z=-81915] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=15, x=-81920, y=127, z=-81915] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=15, x=-81920, y=126, z=-163835] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=15, x=-163840, y=63, z=-163835] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=16, counter++=15, x=-163840, y=63, z=-163835] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=16] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=16] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=16, x=-163840, y=63, z=-163835] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=16, x=-163840, y=63, z=-163835] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=16, x=-163840, y=62, z=-327675] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=16, x=-327680, y=31, z=-327675] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=17, counter++=16, x=-327680, y=31, z=-327675] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=17, x=-327680, y=31, z=-327675] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=17, x=-327680, y=31, z=-327675] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=17, x=-327680, y=30, z=-655355] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=17, x=-655360, y=15, z=-655355] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=18, counter++=17, x=-655360, y=15, z=-655355] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=18] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=18] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=18, x=-655360, y=15, z=-655355] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=18, x=-655360, y=15, z=-655355] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=18, x=-655360, y=14, z=-1310715] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=18, x=-1310720, y=7, z=-1310715] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=19, counter++=18, x=-1310720, y=7, z=-1310715] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=19] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=19] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=19, x=-1310720, y=7, z=-1310715] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=19, x=-1310720, y=7, z=-1310715] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=19, x=-1310720, y=6, z=-2621435] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=19, x=-2621440, y=3, z=-2621435] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=20, counter++=19, x=-2621440, y=3, z=-2621435] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=20] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=20] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-5, b=2097151, counter=20, x=-2621440, y=3, z=-2621435] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-5, b=2097151, counter=20, x=-2621440, y=3, z=-2621435] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-5, b=2097151, counter=20, x=-2621440, y=2, z=-5242875] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-5, b=2097151, counter=20, x=-5242880, y=1, z=-5242875] [L33] EXPR counter++ VAL [\old(counter)=0, a=-5, b=2097151, counter=21, counter++=20, x=-5242880, y=1, z=-5242875] [L33] COND FALSE !(counter++<20) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, \old(counter)=0, counter=21] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] [L15] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 135.5s, OverallIterations: 14, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 39.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 721 SdHoareTripleChecker+Valid, 31.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 709 mSDsluCounter, 1928 SdHoareTripleChecker+Invalid, 31.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 27 IncrementalHoareTripleChecker+Unchecked, 1584 mSDsCounter, 289 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1836 IncrementalHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 289 mSolverCounterUnsat, 344 mSDtfsCounter, 1836 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 996 GetRequests, 744 SyntacticMatches, 15 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 30.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=253occurred in iteration=11, InterpolantAutomatonStates: 191, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 256 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 11.1s SatisfiabilityAnalysisTime, 80.7s InterpolantComputationTime, 743 NumberOfCodeBlocks, 743 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 894 ConstructedInterpolants, 2 QuantifiedInterpolants, 5787 SizeOfPredicates, 50 NumberOfNonLiveVariables, 1695 ConjunctsInSsa, 253 ConjunctsInUnsatCore, 21 InterpolantComputations, 4 PerfectInterpolantSequences, 423/1466 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-05 09:01:10,736 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...