/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 06:08:17,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 06:08:17,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 06:08:17,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 06:08:18,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 06:08:18,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 06:08:18,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 06:08:18,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 06:08:18,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 06:08:18,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 06:08:18,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 06:08:18,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 06:08:18,020 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 06:08:18,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 06:08:18,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 06:08:18,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 06:08:18,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 06:08:18,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 06:08:18,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 06:08:18,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 06:08:18,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 06:08:18,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 06:08:18,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 06:08:18,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 06:08:18,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 06:08:18,049 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 06:08:18,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 06:08:18,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 06:08:18,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 06:08:18,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 06:08:18,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 06:08:18,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 06:08:18,049 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 06:08:18,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 06:08:18,049 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 06:08:18,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 06:08:18,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 06:08:18,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 06:08:18,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 06:08:18,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 06:08:18,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:08:18,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 06:08:18,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 06:08:18,051 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 06:08:18,051 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 06:08:18,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 06:08:18,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 06:08:18,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 06:08:18,253 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 06:08:18,254 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 06:08:18,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2022-04-06 06:08:18,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bf5ba02b/d337fea92c134e7087e5e467832afc3f/FLAG40c6525b3 [2022-04-06 06:08:18,707 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 06:08:18,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2022-04-06 06:08:18,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bf5ba02b/d337fea92c134e7087e5e467832afc3f/FLAG40c6525b3 [2022-04-06 06:08:18,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bf5ba02b/d337fea92c134e7087e5e467832afc3f [2022-04-06 06:08:18,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 06:08:18,726 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 06:08:18,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 06:08:18,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 06:08:18,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 06:08:18,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:08:18" (1/1) ... [2022-04-06 06:08:18,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f35359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:18, skipping insertion in model container [2022-04-06 06:08:18,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:08:18" (1/1) ... [2022-04-06 06:08:18,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 06:08:18,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 06:08:18,932 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/dijkstra-u_unwindbound2.c[525,538] [2022-04-06 06:08:18,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:08:18,972 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 06:08:18,980 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/dijkstra-u_unwindbound2.c[525,538] [2022-04-06 06:08:18,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:08:18,999 INFO L208 MainTranslator]: Completed translation [2022-04-06 06:08:19,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:19 WrapperNode [2022-04-06 06:08:19,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 06:08:19,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 06:08:19,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 06:08:19,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 06:08:19,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:19" (1/1) ... [2022-04-06 06:08:19,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:19" (1/1) ... [2022-04-06 06:08:19,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:19" (1/1) ... [2022-04-06 06:08:19,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:19" (1/1) ... [2022-04-06 06:08:19,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:19" (1/1) ... [2022-04-06 06:08:19,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:19" (1/1) ... [2022-04-06 06:08:19,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:19" (1/1) ... [2022-04-06 06:08:19,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 06:08:19,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 06:08:19,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 06:08:19,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 06:08:19,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:19" (1/1) ... [2022-04-06 06:08:19,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:08:19,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:19,064 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) [2022-04-06 06:08:19,065 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 [2022-04-06 06:08:19,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 06:08:19,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 06:08:19,091 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 06:08:19,092 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 06:08:19,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 06:08:19,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 06:08:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 06:08:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 06:08:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 06:08:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 06:08:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 06:08:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 06:08:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 06:08:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 06:08:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 06:08:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 06:08:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 06:08:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 06:08:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 06:08:19,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 06:08:19,140 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 06:08:19,141 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 06:08:19,252 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 06:08:19,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 06:08:19,256 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 06:08:19,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:19 BoogieIcfgContainer [2022-04-06 06:08:19,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 06:08:19,258 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 06:08:19,259 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 06:08:19,265 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 06:08:19,267 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:19" (1/1) ... [2022-04-06 06:08:19,269 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 06:08:19,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:08:19 BasicIcfg [2022-04-06 06:08:19,309 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 06:08:19,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 06:08:19,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 06:08:19,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 06:08:19,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:08:18" (1/4) ... [2022-04-06 06:08:19,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1ccdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:08:19, skipping insertion in model container [2022-04-06 06:08:19,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:19" (2/4) ... [2022-04-06 06:08:19,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1ccdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:08:19, skipping insertion in model container [2022-04-06 06:08:19,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:19" (3/4) ... [2022-04-06 06:08:19,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1ccdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:08:19, skipping insertion in model container [2022-04-06 06:08:19,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:08:19" (4/4) ... [2022-04-06 06:08:19,315 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound2.cJordan [2022-04-06 06:08:19,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 06:08:19,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 06:08:19,368 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 06:08:19,373 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-04-06 06:08:19,373 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 06:08:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 06:08:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 06:08:19,405 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:19,405 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:19,406 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2022-04-06 06:08:19,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:19,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887938795] [2022-04-06 06:08:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:19,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:08:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:19,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:08:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:19,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:19,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887938795] [2022-04-06 06:08:19,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887938795] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:19,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:19,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 06:08:19,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279223362] [2022-04-06 06:08:19,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:19,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 06:08:19,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:19,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 06:08:19,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:08:19,653 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 06:08:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:20,326 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-04-06 06:08:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 06:08:20,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 06:08:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:20,333 INFO L225 Difference]: With dead ends: 40 [2022-04-06 06:08:20,333 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 06:08:20,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:08:20,336 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:20,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 06:08:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 06:08:20,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 06:08:20,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 06:08:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-04-06 06:08:20,379 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-04-06 06:08:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:20,380 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-04-06 06:08:20,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 06:08:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-04-06 06:08:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 06:08:20,382 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:20,382 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:20,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 06:08:20,383 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:20,385 INFO L85 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2022-04-06 06:08:20,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:20,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875715586] [2022-04-06 06:08:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:20,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:20,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:08:20,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810469360] [2022-04-06 06:08:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:20,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:20,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:20,411 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) [2022-04-06 06:08:20,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 06:08:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:20,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 06:08:20,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:08:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:20,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:08:20,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875715586] [2022-04-06 06:08:20,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:08:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810469360] [2022-04-06 06:08:20,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810469360] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:20,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:20,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 06:08:20,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884306982] [2022-04-06 06:08:20,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:20,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 06:08:20,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 06:08:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:08:20,562 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-04-06 06:08:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:20,572 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-04-06 06:08:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 06:08:20,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2022-04-06 06:08:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:20,573 INFO L225 Difference]: With dead ends: 36 [2022-04-06 06:08:20,573 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 06:08:20,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:08:20,574 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:20,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:08:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 06:08:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 06:08:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 06:08:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-04-06 06:08:20,579 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-04-06 06:08:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:20,580 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-04-06 06:08:20,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-04-06 06:08:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-04-06 06:08:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 06:08:20,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:20,581 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:20,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 06:08:20,797 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 [2022-04-06 06:08:20,798 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:20,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2022-04-06 06:08:20,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:20,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853208000] [2022-04-06 06:08:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:20,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:20,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:08:20,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566910366] [2022-04-06 06:08:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:20,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:20,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:20,814 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) [2022-04-06 06:08:20,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 06:08:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:08:20,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:08:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:20,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:08:20,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:20,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853208000] [2022-04-06 06:08:20,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:08:20,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566910366] [2022-04-06 06:08:20,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566910366] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:20,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:20,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:08:20,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848823145] [2022-04-06 06:08:20,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:20,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:08:20,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:20,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:08:20,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:08:20,975 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-04-06 06:08:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:20,992 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2022-04-06 06:08:20,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:08:20,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2022-04-06 06:08:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:20,993 INFO L225 Difference]: With dead ends: 40 [2022-04-06 06:08:20,993 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 06:08:20,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:08:20,994 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:20,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 120 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:08:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 06:08:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-04-06 06:08:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 06:08:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-04-06 06:08:20,999 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-04-06 06:08:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:21,000 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-04-06 06:08:21,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-04-06 06:08:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-04-06 06:08:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 06:08:21,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:21,000 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:21,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 06:08:21,207 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 [2022-04-06 06:08:21,208 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2022-04-06 06:08:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:21,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272407708] [2022-04-06 06:08:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:21,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:21,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:08:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:21,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:08:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272407708] [2022-04-06 06:08:21,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272407708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:21,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:21,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 06:08:21,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602350728] [2022-04-06 06:08:21,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:21,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 06:08:21,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:21,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 06:08:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 06:08:21,389 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-04-06 06:08:23,943 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 [] [2022-04-06 06:08:26,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:08:28,090 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:08:30,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:33,180 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-04-06 06:08:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 06:08:33,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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 21 [2022-04-06 06:08:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:33,182 INFO L225 Difference]: With dead ends: 53 [2022-04-06 06:08:33,182 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 06:08:33,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:08:33,183 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 24 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 37 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:33,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 107 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 204 Invalid, 4 Unknown, 0 Unchecked, 11.7s Time] [2022-04-06 06:08:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 06:08:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-06 06:08:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 06:08:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-04-06 06:08:33,191 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-04-06 06:08:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:33,191 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-04-06 06:08:33,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-04-06 06:08:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-04-06 06:08:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:08:33,192 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:33,192 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] [2022-04-06 06:08:33,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 06:08:33,192 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1908885951, now seen corresponding path program 1 times [2022-04-06 06:08:33,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:33,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204845402] [2022-04-06 06:08:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:33,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:08:33,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116955385] [2022-04-06 06:08:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:33,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:33,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:33,203 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) [2022-04-06 06:08:33,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 06:08:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:33,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:08:33,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:08:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:33,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:08:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:33,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:33,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204845402] [2022-04-06 06:08:33,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:08:33,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116955385] [2022-04-06 06:08:33,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116955385] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:08:33,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:08:33,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-04-06 06:08:33,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875353570] [2022-04-06 06:08:33,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:08:33,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:08:33,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:33,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:08:33,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:08:33,355 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:08:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:33,383 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-04-06 06:08:33,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 06:08:33,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 06:08:33,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:33,387 INFO L225 Difference]: With dead ends: 53 [2022-04-06 06:08:33,387 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 06:08:33,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:08:33,389 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:33,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 119 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:08:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 06:08:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-04-06 06:08:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 06:08:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2022-04-06 06:08:33,416 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 23 [2022-04-06 06:08:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:33,417 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2022-04-06 06:08:33,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:08:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2022-04-06 06:08:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 06:08:33,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:33,417 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] [2022-04-06 06:08:33,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 06:08:33,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:33,632 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:33,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1731080004, now seen corresponding path program 1 times [2022-04-06 06:08:33,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:33,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777654257] [2022-04-06 06:08:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:33,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:33,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:08:33,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959345460] [2022-04-06 06:08:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:33,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:33,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:33,642 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) [2022-04-06 06:08:33,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 06:08:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:33,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:08:33,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:08:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 06:08:33,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:08:33,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:33,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777654257] [2022-04-06 06:08:33,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:08:33,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959345460] [2022-04-06 06:08:33,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959345460] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:33,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:33,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:08:33,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730133670] [2022-04-06 06:08:33,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:33,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:08:33,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:33,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:08:33,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:08:33,789 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-04-06 06:08:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:34,460 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2022-04-06 06:08:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:08:34,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 24 [2022-04-06 06:08:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:34,462 INFO L225 Difference]: With dead ends: 73 [2022-04-06 06:08:34,462 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 06:08:34,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:08:34,462 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:34,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 157 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 06:08:34,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 06:08:34,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 06:08:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 06:08:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2022-04-06 06:08:34,468 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 24 [2022-04-06 06:08:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:34,469 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2022-04-06 06:08:34,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-04-06 06:08:34,469 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2022-04-06 06:08:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 06:08:34,469 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:34,470 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] [2022-04-06 06:08:34,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 06:08:34,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:34,671 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:34,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:34,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1729947946, now seen corresponding path program 1 times [2022-04-06 06:08:34,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:34,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358891809] [2022-04-06 06:08:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:34,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:34,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:08:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:34,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:08:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:34,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358891809] [2022-04-06 06:08:34,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358891809] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:34,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:34,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 06:08:34,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386208750] [2022-04-06 06:08:34,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:34,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 06:08:34,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 06:08:34,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-06 06:08:34,782 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 06:08:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:35,368 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-04-06 06:08:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 06:08:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-06 06:08:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:35,368 INFO L225 Difference]: With dead ends: 34 [2022-04-06 06:08:35,369 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 06:08:35,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:08:35,369 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:35,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 45 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 06:08:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 06:08:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 06:08:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 06:08:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-04-06 06:08:35,372 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2022-04-06 06:08:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:35,372 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-04-06 06:08:35,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 06:08:35,372 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-04-06 06:08:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 06:08:35,373 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:35,373 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:35,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 06:08:35,373 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:35,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1279154140, now seen corresponding path program 1 times [2022-04-06 06:08:35,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:35,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337695168] [2022-04-06 06:08:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:35,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:35,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:08:35,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2404608] [2022-04-06 06:08:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:35,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:35,382 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) [2022-04-06 06:08:35,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 06:08:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:35,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:08:35,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:08:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 06:08:35,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:08:35,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:35,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337695168] [2022-04-06 06:08:35,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:08:35,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2404608] [2022-04-06 06:08:35,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2404608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:35,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:35,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:08:35,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31510576] [2022-04-06 06:08:35,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:35,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:08:35,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:08:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:08:35,522 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:08:37,531 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 [] [2022-04-06 06:08:37,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:37,542 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-04-06 06:08:37,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:08:37,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-06 06:08:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:37,543 INFO L225 Difference]: With dead ends: 30 [2022-04-06 06:08:37,543 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 06:08:37,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:08:37,543 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:37,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 06:08:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 06:08:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 06:08:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 06:08:37,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 06:08:37,544 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-04-06 06:08:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:37,544 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 06:08:37,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:08:37,545 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 06:08:37,545 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 06:08:37,547 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 06:08:37,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 06:08:37,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:37,754 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:37,755 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 06:08:37,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:08:37 BasicIcfg [2022-04-06 06:08:37,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 06:08:37,757 INFO L158 Benchmark]: Toolchain (without parser) took 19031.89ms. Allocated memory was 208.7MB in the beginning and 313.5MB in the end (delta: 104.9MB). Free memory was 154.8MB in the beginning and 241.2MB in the end (delta: -86.4MB). Peak memory consumption was 18.7MB. Max. memory is 8.0GB. [2022-04-06 06:08:37,758 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 208.7MB. Free memory is still 171.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 06:08:37,758 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.11ms. Allocated memory is still 208.7MB. Free memory was 154.6MB in the beginning and 183.4MB in the end (delta: -28.8MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-04-06 06:08:37,758 INFO L158 Benchmark]: Boogie Preprocessor took 34.97ms. Allocated memory is still 208.7MB. Free memory was 183.4MB in the beginning and 181.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 06:08:37,758 INFO L158 Benchmark]: RCFGBuilder took 221.56ms. Allocated memory is still 208.7MB. Free memory was 181.9MB in the beginning and 169.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 06:08:37,758 INFO L158 Benchmark]: IcfgTransformer took 50.96ms. Allocated memory is still 208.7MB. Free memory was 169.4MB in the beginning and 167.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 06:08:37,759 INFO L158 Benchmark]: TraceAbstraction took 18446.63ms. Allocated memory was 208.7MB in the beginning and 313.5MB in the end (delta: 104.9MB). Free memory was 166.7MB in the beginning and 241.2MB in the end (delta: -74.5MB). Peak memory consumption was 30.9MB. Max. memory is 8.0GB. [2022-04-06 06:08:37,760 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 208.7MB. Free memory is still 171.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 273.11ms. Allocated memory is still 208.7MB. Free memory was 154.6MB in the beginning and 183.4MB in the end (delta: -28.8MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.97ms. Allocated memory is still 208.7MB. Free memory was 183.4MB in the beginning and 181.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 221.56ms. Allocated memory is still 208.7MB. Free memory was 181.9MB in the beginning and 169.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 50.96ms. Allocated memory is still 208.7MB. Free memory was 169.4MB in the beginning and 167.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 18446.63ms. Allocated memory was 208.7MB in the beginning and 313.5MB in the end (delta: 104.9MB). Free memory was 166.7MB in the beginning and 241.2MB in the end (delta: -74.5MB). Peak memory consumption was 30.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18.4s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 15.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 94 SdHoareTripleChecker+Valid, 15.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 83 mSDsluCounter, 794 SdHoareTripleChecker+Invalid, 15.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 468 mSDsCounter, 71 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 388 IncrementalHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 71 mSolverCounterUnsat, 326 mSDtfsCounter, 388 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 194 ConstructedInterpolants, 0 QuantifiedInterpolants, 594 SizeOfPredicates, 7 NumberOfNonLiveVariables, 461 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 11/15 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-06 06:08:37,776 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...