/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/divbin2_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 18:39:22,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 18:39:22,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 18:39:22,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 18:39:22,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 18:39:22,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 18:39:22,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 18:39:22,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 18:39:22,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 18:39:22,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 18:39:22,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 18:39:22,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 18:39:22,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 18:39:22,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 18:39:22,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 18:39:22,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 18:39:22,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 18:39:22,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 18:39:22,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 18:39:22,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 18:39:22,880 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 18:39:22,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 18:39:22,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 18:39:22,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 18:39:22,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 18:39:22,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 18:39:22,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 18:39:22,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 18:39:22,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 18:39:22,909 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 18:39:22,921 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 18:39:22,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 18:39:22,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 18:39:22,924 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 18:39:22,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 18:39:22,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 18:39:22,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 18:39:22,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 18:39:22,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 18:39:22,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 18:39:22,926 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 18:39:22,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 18:39:22,926 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 18:39:22,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 18:39:22,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 18:39:22,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 18:39:22,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 18:39:22,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 18:39:22,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:39:22,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 18:39:22,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 18:39:22,928 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 18:39:22,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 18:39:23,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 18:39:23,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 18:39:23,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 18:39:23,204 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 18:39:23,204 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 18:39:23,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i [2022-03-18 18:39:23,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98b6efec9/277c8d8a856a4ee3b1351c53a75fad50/FLAG7289ceca0 [2022-03-18 18:39:23,619 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 18:39:23,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i [2022-03-18 18:39:23,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98b6efec9/277c8d8a856a4ee3b1351c53a75fad50/FLAG7289ceca0 [2022-03-18 18:39:24,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98b6efec9/277c8d8a856a4ee3b1351c53a75fad50 [2022-03-18 18:39:24,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 18:39:24,048 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 18:39:24,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 18:39:24,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 18:39:24,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 18:39:24,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d8e4fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24, skipping insertion in model container [2022-03-18 18:39:24,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 18:39:24,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 18:39:24,211 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2022-03-18 18:39:24,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:39:24,245 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 18:39:24,254 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2022-03-18 18:39:24,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:39:24,270 INFO L208 MainTranslator]: Completed translation [2022-03-18 18:39:24,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24 WrapperNode [2022-03-18 18:39:24,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 18:39:24,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 18:39:24,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 18:39:24,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 18:39:24,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 18:39:24,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 18:39:24,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 18:39:24,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 18:39:24,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:39:24,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:39:24,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 18:39:24,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 18:39:24,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 18:39:24,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 18:39:24,388 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 18:39:24,388 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 18:39:24,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 18:39:24,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 18:39:24,389 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 18:39:24,389 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 18:39:24,389 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 18:39:24,389 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 18:39:24,389 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 18:39:24,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 18:39:24,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 18:39:24,390 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 18:39:24,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 18:39:24,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 18:39:24,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 18:39:24,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 18:39:24,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 18:39:24,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 18:39:24,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 18:39:24,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 18:39:24,472 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 18:39:24,474 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 18:39:24,577 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 18:39:24,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 18:39:24,582 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 18:39:24,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:39:24 BoogieIcfgContainer [2022-03-18 18:39:24,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 18:39:24,585 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 18:39:24,585 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 18:39:24,586 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 18:39:24,588 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:39:24" (1/1) ... [2022-03-18 18:39:24,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:39:24 BasicIcfg [2022-03-18 18:39:24,603 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 18:39:24,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 18:39:24,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 18:39:24,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 18:39:24,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 06:39:24" (1/4) ... [2022-03-18 18:39:24,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dab154b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:39:24, skipping insertion in model container [2022-03-18 18:39:24,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:39:24" (2/4) ... [2022-03-18 18:39:24,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dab154b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:39:24, skipping insertion in model container [2022-03-18 18:39:24,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:39:24" (3/4) ... [2022-03-18 18:39:24,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dab154b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 06:39:24, skipping insertion in model container [2022-03-18 18:39:24,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:39:24" (4/4) ... [2022-03-18 18:39:24,610 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound10.iJordan [2022-03-18 18:39:24,614 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 18:39:24,615 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 18:39:24,656 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 18:39:24,667 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 [2022-03-18 18:39:24,667 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 18:39:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 18:39:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 18:39:24,705 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:39:24,706 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:39:24,706 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:39:24,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:39:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2022-03-18 18:39:24,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:39:24,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084613594] [2022-03-18 18:39:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:24,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:39:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:24,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:39:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:24,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:39:24,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084613594] [2022-03-18 18:39:24,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084613594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:39:24,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:39:24,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 18:39:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392047219] [2022-03-18 18:39:24,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:39:24,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 18:39:24,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:39:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 18:39:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 18:39:24,908 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:39:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:39:24,958 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-03-18 18:39:24,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 18:39:24,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 18:39:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:39:24,967 INFO L225 Difference]: With dead ends: 27 [2022-03-18 18:39:24,968 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 18:39:24,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 18:39:24,973 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:39:24,974 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:39:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 18:39:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-18 18:39:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 18:39:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-03-18 18:39:25,006 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-03-18 18:39:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:39:25,007 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-03-18 18:39:25,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:39:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-03-18 18:39:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 18:39:25,008 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:39:25,008 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:39:25,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 18:39:25,009 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:39:25,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:39:25,010 INFO L85 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2022-03-18 18:39:25,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:39:25,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748384429] [2022-03-18 18:39:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:25,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:39:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:25,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:39:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:25,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:39:25,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748384429] [2022-03-18 18:39:25,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748384429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:39:25,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:39:25,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 18:39:25,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534004809] [2022-03-18 18:39:25,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:39:25,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 18:39:25,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:39:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 18:39:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:39:25,090 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:39:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:39:25,144 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-03-18 18:39:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 18:39:25,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 18:39:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:39:25,146 INFO L225 Difference]: With dead ends: 23 [2022-03-18 18:39:25,146 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 18:39:25,146 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:39:25,148 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:39:25,148 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:39:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 18:39:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-18 18:39:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 18:39:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-03-18 18:39:25,153 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2022-03-18 18:39:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:39:25,153 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-03-18 18:39:25,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:39:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-03-18 18:39:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 18:39:25,154 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:39:25,154 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:39:25,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 18:39:25,155 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:39:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:39:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2022-03-18 18:39:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:39:25,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877474223] [2022-03-18 18:39:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:39:25,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:39:25,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860809566] [2022-03-18 18:39:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:25,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:25,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:39:25,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:39:25,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 18:39:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 18:39:25,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:39:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:25,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:39:25,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:39:25,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877474223] [2022-03-18 18:39:25,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:39:25,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860809566] [2022-03-18 18:39:25,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860809566] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:39:25,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:39:25,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 18:39:25,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324647765] [2022-03-18 18:39:25,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:39:25,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 18:39:25,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:39:25,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 18:39:25,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:39:25,369 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:39:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:39:25,385 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-03-18 18:39:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 18:39:25,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 18:39:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:39:25,387 INFO L225 Difference]: With dead ends: 27 [2022-03-18 18:39:25,387 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 18:39:25,387 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:39:25,388 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:39:25,389 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:39:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 18:39:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-18 18:39:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 18:39:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-03-18 18:39:25,393 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-03-18 18:39:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:39:25,393 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-03-18 18:39:25,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:39:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-03-18 18:39:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 18:39:25,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:39:25,394 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:39:25,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 18:39:25,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:25,612 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:39:25,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:39:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2022-03-18 18:39:25,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:39:25,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118425458] [2022-03-18 18:39:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:25,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:39:25,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:39:25,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137897651] [2022-03-18 18:39:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:25,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:39:25,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:39:25,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 18:39:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 18:39:25,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:39:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:25,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:39:25,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:39:25,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118425458] [2022-03-18 18:39:25,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:39:25,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137897651] [2022-03-18 18:39:25,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137897651] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:39:25,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:39:25,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 18:39:25,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180211779] [2022-03-18 18:39:25,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:39:25,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 18:39:25,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:39:25,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 18:39:25,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:39:25,833 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:39:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:39:25,879 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-03-18 18:39:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 18:39:25,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 18:39:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:39:25,881 INFO L225 Difference]: With dead ends: 33 [2022-03-18 18:39:25,881 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 18:39:25,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-18 18:39:25,882 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:39:25,883 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:39:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 18:39:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 18:39:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 18:39:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-18 18:39:25,888 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2022-03-18 18:39:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:39:25,888 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-18 18:39:25,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:39:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-18 18:39:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 18:39:25,889 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:39:25,889 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:39:25,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 18:39:26,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 18:39:26,104 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:39:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:39:26,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2022-03-18 18:39:26,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:39:26,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403697922] [2022-03-18 18:39:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:39:26,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:39:26,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73510715] [2022-03-18 18:39:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:26,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:26,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:39:26,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:39:26,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 18:39:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:26,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 18:39:26,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:39:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:26,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:39:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:26,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:39:26,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403697922] [2022-03-18 18:39:26,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:39:26,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73510715] [2022-03-18 18:39:26,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73510715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:39:26,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:39:26,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 18:39:26,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528229265] [2022-03-18 18:39:26,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:39:26,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 18:39:26,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:39:26,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 18:39:26,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:39:26,375 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 18:39:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:39:26,424 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-18 18:39:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 18:39:26,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 18:39:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:39:26,427 INFO L225 Difference]: With dead ends: 54 [2022-03-18 18:39:26,428 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 18:39:26,429 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 18:39:26,430 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:39:26,430 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 94 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:39:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 18:39:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2022-03-18 18:39:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 18:39:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-03-18 18:39:26,435 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 17 [2022-03-18 18:39:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:39:26,435 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-03-18 18:39:26,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 18:39:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-03-18 18:39:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 18:39:26,436 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:39:26,436 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:39:26,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 18:39:26,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:26,637 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:39:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:39:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2022-03-18 18:39:26,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:39:26,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302904944] [2022-03-18 18:39:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:26,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:39:26,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:39:26,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015043627] [2022-03-18 18:39:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:26,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:26,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:39:26,651 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:39:26,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 18:39:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:26,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 18:39:26,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:39:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:26,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:39:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:26,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:39:26,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302904944] [2022-03-18 18:39:26,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:39:26,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015043627] [2022-03-18 18:39:26,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015043627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:39:26,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:39:26,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 18:39:26,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256895775] [2022-03-18 18:39:26,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:39:26,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 18:39:26,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:39:26,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 18:39:26,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:39:26,807 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 18:39:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:39:26,886 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2022-03-18 18:39:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 18:39:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-18 18:39:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:39:26,887 INFO L225 Difference]: With dead ends: 84 [2022-03-18 18:39:26,887 INFO L226 Difference]: Without dead ends: 84 [2022-03-18 18:39:26,888 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-18 18:39:26,889 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 79 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:39:26,889 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 136 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:39:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-18 18:39:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2022-03-18 18:39:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 63 states have internal predecessors, (81), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 18:39:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2022-03-18 18:39:26,897 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 18 [2022-03-18 18:39:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:39:26,898 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2022-03-18 18:39:26,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 18:39:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2022-03-18 18:39:26,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 18:39:26,899 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:39:26,899 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:39:26,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 18:39:27,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:27,115 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:39:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:39:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2052329254, now seen corresponding path program 1 times [2022-03-18 18:39:27,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:39:27,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478439100] [2022-03-18 18:39:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:27,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:39:27,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:39:27,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661829216] [2022-03-18 18:39:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:27,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:39:27,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:39:27,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 18:39:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 18:39:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:39:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:27,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:39:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:27,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:39:27,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478439100] [2022-03-18 18:39:27,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:39:27,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661829216] [2022-03-18 18:39:27,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661829216] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 18:39:27,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 18:39:27,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-18 18:39:27,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076330372] [2022-03-18 18:39:27,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:39:27,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 18:39:27,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:39:27,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 18:39:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:39:27,543 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:39:27,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:39:27,559 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2022-03-18 18:39:27,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 18:39:27,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-18 18:39:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:39:27,562 INFO L225 Difference]: With dead ends: 108 [2022-03-18 18:39:27,562 INFO L226 Difference]: Without dead ends: 108 [2022-03-18 18:39:27,563 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 18:39:27,563 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:39:27,564 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 104 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-03-18 18:39:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-18 18:39:27,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-03-18 18:39:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 89 states have internal predecessors, (104), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 18:39:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2022-03-18 18:39:27,573 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 18 [2022-03-18 18:39:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:39:27,574 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2022-03-18 18:39:27,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:39:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2022-03-18 18:39:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 18:39:27,575 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:39:27,575 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:39:27,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 18:39:27,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:27,780 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:39:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:39:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 462666167, now seen corresponding path program 1 times [2022-03-18 18:39:27,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:39:27,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138698880] [2022-03-18 18:39:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:27,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:39:27,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:39:27,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832653369] [2022-03-18 18:39:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:27,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:27,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:39:27,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:39:27,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 18:39:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:27,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 18:39:27,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:39:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:27,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:39:27,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:39:27,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138698880] [2022-03-18 18:39:27,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:39:27,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832653369] [2022-03-18 18:39:27,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832653369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:39:27,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:39:27,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 18:39:27,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038463535] [2022-03-18 18:39:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:39:27,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 18:39:27,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:39:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 18:39:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 18:39:27,901 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 18:39:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:39:27,920 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2022-03-18 18:39:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 18:39:27,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-18 18:39:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:39:27,934 INFO L225 Difference]: With dead ends: 103 [2022-03-18 18:39:27,934 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 18:39:27,934 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 18:39:27,935 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:39:27,935 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:39:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 18:39:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-18 18:39:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 77 states have internal predecessors, (91), 13 states have call successors, (13), 10 states have call predecessors, (13), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 18:39:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-03-18 18:39:27,944 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 24 [2022-03-18 18:39:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:39:27,944 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-03-18 18:39:27,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 18:39:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-03-18 18:39:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 18:39:27,945 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:39:27,945 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:39:27,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 18:39:28,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:28,168 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:39:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:39:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1651364104, now seen corresponding path program 1 times [2022-03-18 18:39:28,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:39:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775001320] [2022-03-18 18:39:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:39:28,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:39:28,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541039264] [2022-03-18 18:39:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:28,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:28,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:39:28,180 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:39:28,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 18:39:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 18:39:28,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:39:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 18:39:28,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:39:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 18:39:28,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:39:28,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775001320] [2022-03-18 18:39:28,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:39:28,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541039264] [2022-03-18 18:39:28,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541039264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:39:28,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:39:28,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-18 18:39:28,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477399050] [2022-03-18 18:39:28,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:39:28,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 18:39:28,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:39:28,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 18:39:28,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 18:39:28,402 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 18:39:30,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:39:32,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:39:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:39:32,659 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2022-03-18 18:39:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 18:39:32,660 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-03-18 18:39:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:39:32,661 INFO L225 Difference]: With dead ends: 106 [2022-03-18 18:39:32,661 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 18:39:32,661 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-18 18:39:32,662 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-18 18:39:32,662 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 92 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-03-18 18:39:32,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 18:39:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-18 18:39:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 18:39:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2022-03-18 18:39:32,675 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 24 [2022-03-18 18:39:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:39:32,677 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2022-03-18 18:39:32,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 18:39:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2022-03-18 18:39:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 18:39:32,679 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:39:32,679 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:39:32,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 18:39:32,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:32,892 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:39:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:39:32,892 INFO L85 PathProgramCache]: Analyzing trace with hash -268589446, now seen corresponding path program 1 times [2022-03-18 18:39:32,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:39:32,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415695369] [2022-03-18 18:39:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:32,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:39:32,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:39:32,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67719723] [2022-03-18 18:39:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:39:32,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:39:32,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:39:32,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:39:32,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 18:39:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:39:32,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 18:39:32,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:39:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:39:33,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:39:44,066 WARN L232 SmtUtils]: Spent 6.35s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 18:39:58,949 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~b~0 2) 4294967296)) (.cse0 (mod c_main_~r~0 4294967296))) (or (not (<= (mod c_main_~b~0 4294967296) .cse0)) (= (mod c_main_~A~0 4294967296) (mod (+ (* (div .cse1 2) (* c_main_~q~0 2)) c_main_~r~0) 4294967296)) (<= .cse1 .cse0))) is different from true [2022-03-18 18:40:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-03-18 18:40:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:40:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415695369] [2022-03-18 18:40:17,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:40:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67719723] [2022-03-18 18:40:17,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67719723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:40:17,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:40:17,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-03-18 18:40:17,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384703712] [2022-03-18 18:40:17,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:40:17,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 18:40:17,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:40:17,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 18:40:17,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=95, Unknown=2, NotChecked=20, Total=156 [2022-03-18 18:40:17,977 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 18:40:24,377 WARN L232 SmtUtils]: Spent 6.35s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 18:40:26,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:28,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:30,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:32,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:34,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:36,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:41,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:43,419 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:45,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:47,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:49,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:51,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:54,061 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:56,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:40:58,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:41:00,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:41:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:41:00,526 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-03-18 18:41:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 18:41:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-03-18 18:41:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:41:00,639 INFO L225 Difference]: With dead ends: 98 [2022-03-18 18:41:00,639 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 18:41:00,639 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=52, Invalid=132, Unknown=2, NotChecked=24, Total=210 [2022-03-18 18:41:00,640 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 34.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:41:00,640 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 167 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 16 Unknown, 45 Unchecked, 34.0s Time] [2022-03-18 18:41:00,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 18:41:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-03-18 18:41:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 18:41:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2022-03-18 18:41:00,647 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 27 [2022-03-18 18:41:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:41:00,647 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2022-03-18 18:41:00,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 18:41:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2022-03-18 18:41:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 18:41:00,648 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:41:00,648 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:41:00,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 18:41:00,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 18:41:00,852 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:41:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:41:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash -142927336, now seen corresponding path program 1 times [2022-03-18 18:41:00,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:41:00,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727980717] [2022-03-18 18:41:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:41:00,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:41:00,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:41:00,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621598068] [2022-03-18 18:41:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:41:00,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:41:00,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:41:00,881 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:41:00,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process