/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/ps4-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 08:10:44,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 08:10:44,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 08:10:44,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 08:10:44,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 08:10:44,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 08:10:44,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 08:10:44,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 08:10:44,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 08:10:44,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 08:10:44,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 08:10:44,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 08:10:44,784 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 08:10:44,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 08:10:44,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 08:10:44,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 08:10:44,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 08:10:44,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 08:10:44,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 08:10:44,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 08:10:44,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 08:10:44,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 08:10:44,807 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 08:10:44,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 08:10:44,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 08:10:44,808 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 08:10:44,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 08:10:44,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 08:10:44,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 08:10:44,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 08:10:44,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 08:10:44,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 08:10:44,809 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 08:10:44,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 08:10:44,810 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 08:10:44,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 08:10:44,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 08:10:44,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 08:10:44,810 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 08:10:44,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 08:10:44,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:10:44,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 08:10:44,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 08:10:44,811 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 08:10:44,811 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 08:10:45,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 08:10:45,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 08:10:45,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 08:10:45,032 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 08:10:45,032 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 08:10:45,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c [2022-04-06 08:10:45,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2542ce7/d3c8ee46717d4581a93aa3e67f8b6458/FLAGcd417a83f [2022-04-06 08:10:45,423 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 08:10:45,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c [2022-04-06 08:10:45,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2542ce7/d3c8ee46717d4581a93aa3e67f8b6458/FLAGcd417a83f [2022-04-06 08:10:45,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2542ce7/d3c8ee46717d4581a93aa3e67f8b6458 [2022-04-06 08:10:45,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 08:10:45,857 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 08:10:45,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 08:10:45,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 08:10:45,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 08:10:45,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:10:45" (1/1) ... [2022-04-06 08:10:45,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301860f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:45, skipping insertion in model container [2022-04-06 08:10:45,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:10:45" (1/1) ... [2022-04-06 08:10:45,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 08:10:45,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 08:10:45,997 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c[458,471] [2022-04-06 08:10:46,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:10:46,011 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 08:10:46,018 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c[458,471] [2022-04-06 08:10:46,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:10:46,030 INFO L208 MainTranslator]: Completed translation [2022-04-06 08:10:46,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:46 WrapperNode [2022-04-06 08:10:46,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 08:10:46,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 08:10:46,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 08:10:46,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 08:10:46,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:46" (1/1) ... [2022-04-06 08:10:46,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:46" (1/1) ... [2022-04-06 08:10:46,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:46" (1/1) ... [2022-04-06 08:10:46,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:46" (1/1) ... [2022-04-06 08:10:46,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:46" (1/1) ... [2022-04-06 08:10:46,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:46" (1/1) ... [2022-04-06 08:10:46,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:46" (1/1) ... [2022-04-06 08:10:46,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 08:10:46,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 08:10:46,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 08:10:46,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 08:10:46,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:46" (1/1) ... [2022-04-06 08:10:46,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:10:46,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:46,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 08:10:46,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 08:10:46,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 08:10:46,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 08:10:46,093 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 08:10:46,093 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 08:10:46,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 08:10:46,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 08:10:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 08:10:46,134 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 08:10:46,135 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 08:10:46,213 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 08:10:46,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 08:10:46,217 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 08:10:46,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:10:46 BoogieIcfgContainer [2022-04-06 08:10:46,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 08:10:46,218 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 08:10:46,218 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 08:10:46,219 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 08:10:46,221 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:10:46" (1/1) ... [2022-04-06 08:10:46,222 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 08:10:46,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:10:46 BasicIcfg [2022-04-06 08:10:46,233 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 08:10:46,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 08:10:46,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 08:10:46,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 08:10:46,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:10:45" (1/4) ... [2022-04-06 08:10:46,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb70b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:10:46, skipping insertion in model container [2022-04-06 08:10:46,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:46" (2/4) ... [2022-04-06 08:10:46,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb70b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:10:46, skipping insertion in model container [2022-04-06 08:10:46,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:10:46" (3/4) ... [2022-04-06 08:10:46,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb70b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:10:46, skipping insertion in model container [2022-04-06 08:10:46,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:10:46" (4/4) ... [2022-04-06 08:10:46,238 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound100.cJordan [2022-04-06 08:10:46,241 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 08:10:46,241 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 08:10:46,268 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 08:10:46,272 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 08:10:46,272 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 08:10:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 08:10:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 08:10:46,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:46,286 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:46,286 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:46,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1984627219, now seen corresponding path program 1 times [2022-04-06 08:10:46,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:46,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350755775] [2022-04-06 08:10:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:46,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:10:46,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:10:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:10:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:10:46,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350755775] [2022-04-06 08:10:46,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350755775] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:10:46,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:10:46,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 08:10:46,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790183283] [2022-04-06 08:10:46,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:10:46,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 08:10:46,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 08:10:46,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 08:10:46,459 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:10:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:46,519 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-04-06 08:10:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 08:10:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 08:10:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:46,527 INFO L225 Difference]: With dead ends: 24 [2022-04-06 08:10:46,527 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 08:10:46,531 INFO L912 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 [2022-04-06 08:10:46,536 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:46,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:10:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 08:10:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-04-06 08:10:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 08:10:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-04-06 08:10:46,565 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2022-04-06 08:10:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:46,565 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-04-06 08:10:46,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:10:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-04-06 08:10:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 08:10:46,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:46,567 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:46,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 08:10:46,567 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1423332195, now seen corresponding path program 1 times [2022-04-06 08:10:46,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:46,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366225212] [2022-04-06 08:10:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:46,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:46,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:46,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443715265] [2022-04-06 08:10:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:46,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:46,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:46,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 08:10:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:10:46,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 08:10:46,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:10:46,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:10:46,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:46,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366225212] [2022-04-06 08:10:46,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:46,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443715265] [2022-04-06 08:10:46,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443715265] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:10:46,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:10:46,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:10:46,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463219314] [2022-04-06 08:10:46,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:10:46,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:10:46,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:10:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:10:46,747 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:10:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:46,772 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-04-06 08:10:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:10:46,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 08:10:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:46,773 INFO L225 Difference]: With dead ends: 20 [2022-04-06 08:10:46,773 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 08:10:46,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:10:46,774 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:46,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:10:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 08:10:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-06 08:10:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 08:10:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-04-06 08:10:46,777 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-04-06 08:10:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:46,778 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-04-06 08:10:46,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:10:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-06 08:10:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 08:10:46,778 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:46,778 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:46,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 08:10:46,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:46,996 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:46,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1424404671, now seen corresponding path program 1 times [2022-04-06 08:10:46,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:46,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192952561] [2022-04-06 08:10:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:46,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:47,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:47,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541044884] [2022-04-06 08:10:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:47,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:47,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:47,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:47,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 08:10:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:10:47,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 08:10:47,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:10:47,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:10:47,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:47,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192952561] [2022-04-06 08:10:47,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:47,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541044884] [2022-04-06 08:10:47,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541044884] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:10:47,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:10:47,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 08:10:47,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77609501] [2022-04-06 08:10:47,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:10:47,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 08:10:47,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 08:10:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:10:47,113 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:10:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:47,139 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-04-06 08:10:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 08:10:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 08:10:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:47,140 INFO L225 Difference]: With dead ends: 28 [2022-04-06 08:10:47,140 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 08:10:47,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:10:47,141 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:47,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 64 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:10:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 08:10:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 08:10:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 08:10:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-04-06 08:10:47,145 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2022-04-06 08:10:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:47,146 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-04-06 08:10:47,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:10:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-06 08:10:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 08:10:47,146 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:47,146 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:47,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 08:10:47,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 08:10:47,366 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash -381498108, now seen corresponding path program 1 times [2022-04-06 08:10:47,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:47,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848554678] [2022-04-06 08:10:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:47,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:47,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:47,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110949057] [2022-04-06 08:10:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:47,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:47,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:47,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:47,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 08:10:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:10:47,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 08:10:47,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:10:47,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:10:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:10:47,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:47,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848554678] [2022-04-06 08:10:47,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:47,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110949057] [2022-04-06 08:10:47,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110949057] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:10:47,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:10:47,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 08:10:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626423606] [2022-04-06 08:10:47,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:10:47,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 08:10:47,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:47,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 08:10:47,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 08:10:47,613 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 08:10:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:47,698 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-04-06 08:10:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 08:10:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-04-06 08:10:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:47,699 INFO L225 Difference]: With dead ends: 52 [2022-04-06 08:10:47,699 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 08:10:47,700 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 08:10:47,700 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:47,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 86 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:10:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 08:10:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-04-06 08:10:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 08:10:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-04-06 08:10:47,707 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 20 [2022-04-06 08:10:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:47,707 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-04-06 08:10:47,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 08:10:47,707 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-04-06 08:10:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 08:10:47,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:47,708 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:47,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 08:10:47,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:47,924 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash -380425632, now seen corresponding path program 1 times [2022-04-06 08:10:47,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:47,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66608056] [2022-04-06 08:10:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:47,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:47,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:47,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056763900] [2022-04-06 08:10:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:47,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:47,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:47,937 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:47,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 08:10:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:10:47,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 08:10:47,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:10:48,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:10:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 08:10:48,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66608056] [2022-04-06 08:10:48,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056763900] [2022-04-06 08:10:48,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056763900] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 08:10:48,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:10:48,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 08:10:48,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386184538] [2022-04-06 08:10:48,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:10:48,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 08:10:48,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:48,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 08:10:48,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 08:10:48,292 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 08:10:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:48,314 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-04-06 08:10:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 08:10:48,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-06 08:10:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:48,315 INFO L225 Difference]: With dead ends: 60 [2022-04-06 08:10:48,315 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 08:10:48,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 08:10:48,316 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:48,316 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:10:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 08:10:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-04-06 08:10:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 08:10:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-04-06 08:10:48,319 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 20 [2022-04-06 08:10:48,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:48,320 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-04-06 08:10:48,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 08:10:48,320 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-04-06 08:10:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 08:10:48,320 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:48,320 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:48,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 08:10:48,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:48,536 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1647871298, now seen corresponding path program 1 times [2022-04-06 08:10:48,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:48,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626077772] [2022-04-06 08:10:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:48,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:48,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:48,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207621593] [2022-04-06 08:10:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:48,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:48,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:48,548 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:48,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 08:10:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:10:48,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 08:10:48,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 08:10:48,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:10:52,955 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* (- 13) c_main_~y~0 c_main_~y~0)) (.cse3 (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ .cse1 .cse2 .cse3) 4) 0)) (not (<= (div (+ .cse1 .cse2 .cse3 (- 4)) (- 4)) (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))))))) is different from false [2022-04-06 08:10:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:54,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626077772] [2022-04-06 08:10:54,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:54,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207621593] [2022-04-06 08:10:54,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207621593] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:10:54,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:10:54,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 08:10:54,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814784666] [2022-04-06 08:10:54,991 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:10:54,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 08:10:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 08:10:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=140, Unknown=1, NotChecked=24, Total=210 [2022-04-06 08:10:54,992 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 08:10:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:55,071 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-04-06 08:10:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 08:10:55,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-04-06 08:10:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:55,072 INFO L225 Difference]: With dead ends: 48 [2022-04-06 08:10:55,072 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 08:10:55,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=66, Invalid=209, Unknown=1, NotChecked=30, Total=306 [2022-04-06 08:10:55,073 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:55,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:10:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 08:10:55,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 08:10:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 08:10:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-04-06 08:10:55,076 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 26 [2022-04-06 08:10:55,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:55,077 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-04-06 08:10:55,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 08:10:55,077 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-04-06 08:10:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 08:10:55,077 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:55,077 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:55,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 08:10:55,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:55,278 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:55,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:55,278 INFO L85 PathProgramCache]: Analyzing trace with hash 31133987, now seen corresponding path program 2 times [2022-04-06 08:10:55,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:55,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946898789] [2022-04-06 08:10:55,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:55,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:55,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:55,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453629461] [2022-04-06 08:10:55,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 08:10:55,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:55,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:55,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:55,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 08:10:55,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 08:10:55,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:10:55,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 08:10:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 08:10:55,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:10:55,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:55,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946898789] [2022-04-06 08:10:55,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:55,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453629461] [2022-04-06 08:10:55,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453629461] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:10:55,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:10:55,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 08:10:55,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326473527] [2022-04-06 08:10:55,589 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:10:55,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 08:10:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 08:10:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 08:10:55,590 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 08:10:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:55,666 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-04-06 08:10:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 08:10:55,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-04-06 08:10:55,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:55,666 INFO L225 Difference]: With dead ends: 48 [2022-04-06 08:10:55,667 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 08:10:55,667 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 08:10:55,667 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:55,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 132 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:10:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 08:10:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 08:10:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 08:10:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-04-06 08:10:55,670 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2022-04-06 08:10:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:55,671 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-04-06 08:10:55,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 08:10:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-04-06 08:10:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 08:10:55,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:55,671 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:55,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 08:10:55,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:55,888 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1474833412, now seen corresponding path program 3 times [2022-04-06 08:10:55,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:55,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362884491] [2022-04-06 08:10:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:55,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:55,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:55,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735328455] [2022-04-06 08:10:55,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 08:10:55,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:55,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:55,896 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:55,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 08:10:56,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 08:10:56,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:10:56,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 08:10:56,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 08:10:56,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:10:56,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:56,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362884491] [2022-04-06 08:10:56,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:56,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735328455] [2022-04-06 08:10:56,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735328455] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:10:56,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:10:56,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 08:10:56,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113407955] [2022-04-06 08:10:56,266 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:10:56,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 08:10:56,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:56,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 08:10:56,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 08:10:56,267 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 08:10:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:56,349 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-04-06 08:10:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 08:10:56,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2022-04-06 08:10:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:56,350 INFO L225 Difference]: With dead ends: 50 [2022-04-06 08:10:56,350 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 08:10:56,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-06 08:10:56,351 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:56,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 168 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:10:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 08:10:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 08:10:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 08:10:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-04-06 08:10:56,354 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2022-04-06 08:10:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:56,354 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-04-06 08:10:56,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 08:10:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-04-06 08:10:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 08:10:56,355 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:56,355 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:56,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 08:10:56,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:56,556 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 831591399, now seen corresponding path program 2 times [2022-04-06 08:10:56,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:56,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530568714] [2022-04-06 08:10:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:56,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:56,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:56,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684144733] [2022-04-06 08:10:56,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 08:10:56,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:56,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:56,569 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:56,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 08:10:56,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 08:10:56,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:10:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 08:10:56,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:10:56,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:10:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 08:10:56,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530568714] [2022-04-06 08:10:56,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684144733] [2022-04-06 08:10:56,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684144733] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:10:56,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:10:56,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 08:10:56,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293068614] [2022-04-06 08:10:56,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:10:56,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 08:10:56,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 08:10:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 08:10:56,807 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-06 08:10:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:56,939 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2022-04-06 08:10:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 08:10:56,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 44 [2022-04-06 08:10:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:56,940 INFO L225 Difference]: With dead ends: 118 [2022-04-06 08:10:56,940 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 08:10:56,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-04-06 08:10:56,941 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 108 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:56,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 114 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:10:56,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 08:10:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 93. [2022-04-06 08:10:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 08:10:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2022-04-06 08:10:56,946 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 44 [2022-04-06 08:10:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:56,946 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2022-04-06 08:10:56,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-06 08:10:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2022-04-06 08:10:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 08:10:56,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:56,947 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:56,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 08:10:57,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 08:10:57,162 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:57,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1805593115, now seen corresponding path program 4 times [2022-04-06 08:10:57,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:57,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484902376] [2022-04-06 08:10:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:57,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:57,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:57,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797057016] [2022-04-06 08:10:57,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 08:10:57,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:57,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:57,174 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:57,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 08:10:57,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 08:10:57,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:10:57,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 08:10:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 08:10:57,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:10:57,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484902376] [2022-04-06 08:10:57,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797057016] [2022-04-06 08:10:57,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797057016] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:10:57,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:10:57,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 08:10:57,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390849508] [2022-04-06 08:10:57,534 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:10:57,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 08:10:57,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 08:10:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 08:10:57,534 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 08:10:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:57,633 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-04-06 08:10:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 08:10:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-04-06 08:10:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:57,634 INFO L225 Difference]: With dead ends: 96 [2022-04-06 08:10:57,635 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 08:10:57,635 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 08:10:57,635 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:57,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 208 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:10:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 08:10:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-04-06 08:10:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 08:10:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2022-04-06 08:10:57,640 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 50 [2022-04-06 08:10:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:57,640 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2022-04-06 08:10:57,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 08:10:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2022-04-06 08:10:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 08:10:57,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:57,641 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:57,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 08:10:57,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 08:10:57,859 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:57,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1447431878, now seen corresponding path program 5 times [2022-04-06 08:10:57,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:57,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697574196] [2022-04-06 08:10:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:57,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:57,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:57,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538280436] [2022-04-06 08:10:57,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 08:10:57,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:57,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:57,871 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:57,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 08:10:58,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-06 08:10:58,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:10:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 08:10:58,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 08:10:58,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:10:58,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:58,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697574196] [2022-04-06 08:10:58,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:58,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538280436] [2022-04-06 08:10:58,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538280436] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:10:58,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:10:58,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 08:10:58,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733890006] [2022-04-06 08:10:58,394 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:10:58,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 08:10:58,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:58,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 08:10:58,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 08:10:58,395 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 08:10:58,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:58,508 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2022-04-06 08:10:58,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 08:10:58,508 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2022-04-06 08:10:58,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:58,509 INFO L225 Difference]: With dead ends: 96 [2022-04-06 08:10:58,509 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 08:10:58,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 08:10:58,509 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:58,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 252 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:10:58,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 08:10:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-04-06 08:10:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 08:10:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-04-06 08:10:58,514 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 58 [2022-04-06 08:10:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:58,514 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-04-06 08:10:58,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 08:10:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-04-06 08:10:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 08:10:58,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:58,515 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:58,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 08:10:58,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 08:10:58,720 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:58,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:58,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1416046937, now seen corresponding path program 6 times [2022-04-06 08:10:58,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:58,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657463661] [2022-04-06 08:10:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:58,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:58,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:58,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046256489] [2022-04-06 08:10:58,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 08:10:58,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:58,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:58,744 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:58,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 08:10:59,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 08:10:59,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:10:59,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 08:10:59,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:10:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 08:10:59,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:10:59,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:10:59,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657463661] [2022-04-06 08:10:59,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:10:59,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046256489] [2022-04-06 08:10:59,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046256489] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:10:59,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:10:59,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 08:10:59,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105765635] [2022-04-06 08:10:59,493 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:10:59,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 08:10:59,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:10:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 08:10:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-06 08:10:59,494 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 08:10:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:59,628 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-04-06 08:10:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 08:10:59,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2022-04-06 08:10:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:59,629 INFO L225 Difference]: With dead ends: 96 [2022-04-06 08:10:59,629 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 08:10:59,629 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-04-06 08:10:59,630 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:59,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 300 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:10:59,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 08:10:59,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-04-06 08:10:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 08:10:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-04-06 08:10:59,633 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 66 [2022-04-06 08:10:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:59,634 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-04-06 08:10:59,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 08:10:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-04-06 08:10:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 08:10:59,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:59,634 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:59,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 08:10:59,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 08:10:59,835 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash 291122568, now seen corresponding path program 7 times [2022-04-06 08:10:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103772674] [2022-04-06 08:10:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:59,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:59,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763006824] [2022-04-06 08:10:59,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 08:10:59,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:59,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:59,848 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:59,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 08:11:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:11:00,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 08:11:00,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:11:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 08:11:00,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:11:01,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:11:01,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103772674] [2022-04-06 08:11:01,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:11:01,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763006824] [2022-04-06 08:11:01,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763006824] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:11:01,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:11:01,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 08:11:01,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942236427] [2022-04-06 08:11:01,068 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:11:01,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 08:11:01,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:11:01,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 08:11:01,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-04-06 08:11:01,070 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 08:11:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:11:01,228 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-04-06 08:11:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 08:11:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2022-04-06 08:11:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:11:01,229 INFO L225 Difference]: With dead ends: 96 [2022-04-06 08:11:01,229 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 08:11:01,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-04-06 08:11:01,230 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:11:01,230 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 352 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:11:01,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 08:11:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-04-06 08:11:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 08:11:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-04-06 08:11:01,233 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 74 [2022-04-06 08:11:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:11:01,233 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-04-06 08:11:01,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 08:11:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-04-06 08:11:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 08:11:01,234 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:11:01,234 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:11:01,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 08:11:01,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 08:11:01,443 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:11:01,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:11:01,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1938494313, now seen corresponding path program 8 times [2022-04-06 08:11:01,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:11:01,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448507373] [2022-04-06 08:11:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:11:01,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:11:01,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:11:01,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699032507] [2022-04-06 08:11:01,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 08:11:01,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:11:01,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:11:01,452 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:11:01,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 08:11:01,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 08:11:01,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:11:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 08:11:01,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:11:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 08:11:02,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:11:02,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:11:02,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448507373] [2022-04-06 08:11:02,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:11:02,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699032507] [2022-04-06 08:11:02,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699032507] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:11:02,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:11:02,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 08:11:02,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515851935] [2022-04-06 08:11:02,335 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:11:02,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 08:11:02,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:11:02,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 08:11:02,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 08:11:02,335 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 08:11:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:11:02,531 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2022-04-06 08:11:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 08:11:02,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2022-04-06 08:11:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:11:02,532 INFO L225 Difference]: With dead ends: 96 [2022-04-06 08:11:02,532 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 08:11:02,532 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-04-06 08:11:02,533 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:11:02,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 408 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:11:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 08:11:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-04-06 08:11:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 08:11:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-04-06 08:11:02,536 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 82 [2022-04-06 08:11:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:11:02,536 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-04-06 08:11:02,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 08:11:02,536 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-04-06 08:11:02,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 08:11:02,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:11:02,537 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:11:02,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 08:11:02,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 08:11:02,742 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:11:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:11:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash 757893194, now seen corresponding path program 9 times [2022-04-06 08:11:02,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:11:02,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308772438] [2022-04-06 08:11:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:11:02,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:11:02,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:11:02,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636085131] [2022-04-06 08:11:02,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 08:11:02,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:11:02,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:11:02,763 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:11:02,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 08:11:03,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-04-06 08:11:03,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:11:03,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 08:11:03,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:11:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 08:11:03,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:11:07,955 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* 13 c_main_~y~0 c_main_~y~0)) (.cse3 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 c_main_~k~0) (* .cse0 .cse0))) (not (<= (div (+ .cse1 .cse2 4 .cse3) 4) (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))))) (not (= 0 (mod (+ .cse1 .cse2 .cse3) 4))) (< (+ c_main_~c~0 1) c_main_~k~0) (not (< c_main_~c~0 c_main_~k~0)))) is different from false [2022-04-06 08:11:11,995 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ (* c_main_~y~0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1)) (<= c_main_~k~0 c_main_~c~0) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4))) (< (+ c_main_~c~0 1) c_main_~k~0)) is different from false [2022-04-06 08:11:20,070 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~y~0 1))) (or (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 3 (* .cse0 .cse0))) (< (+ 2 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ c_main_~c~0 1)) (not (= (mod (+ (* 6 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 .cse0) (* 13 .cse0 .cse0)) 4) 0)))) is different from false [2022-04-06 08:12:38,211 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 c_main_~y~0))) (or (not (= (mod (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0)) 4) 0)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 9 (* .cse0 .cse0))) (<= c_main_~k~0 (+ c_main_~c~0 4)) (< (+ 5 c_main_~c~0) c_main_~k~0))) is different from false [2022-04-06 08:13:34,603 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 7 c_main_~y~0))) (or (< (+ c_main_~c~0 8) c_main_~k~0) (not (= (mod (+ (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 6)) 4) 0)) (<= c_main_~k~0 (+ 7 c_main_~c~0)) (= (+ (* 2 c_main_~y~0) 15 (* .cse0 .cse0)) (+ c_main_~k~0 (* .cse0 c_main_~k~0))))) is different from false [2022-04-06 08:13:44,675 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ 9 c_main_~c~0) main_~k~0) (= (+ (* main_~k~0 9) (* main_~k~0 c_main_~y~0)) (+ (* 18 c_main_~y~0) 81 (* c_main_~y~0 c_main_~y~0))) (<= main_~k~0 (+ c_main_~c~0 8)))) (not (= (mod (let ((.cse0 (+ 8 c_main_~y~0))) (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 13))) 4) 0))) is different from false [2022-04-06 08:13:46,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:13:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308772438] [2022-04-06 08:13:46,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:13:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636085131] [2022-04-06 08:13:46,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636085131] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:13:46,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:13:46,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-04-06 08:13:46,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423612403] [2022-04-06 08:13:46,696 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:13:46,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 08:13:46,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:13:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 08:13:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=583, Unknown=19, NotChecked=330, Total=1056 [2022-04-06 08:13:46,697 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 08:13:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:13:47,040 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-04-06 08:13:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 08:13:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2022-04-06 08:13:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:13:47,041 INFO L225 Difference]: With dead ends: 98 [2022-04-06 08:13:47,041 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 08:13:47,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 94.4s TimeCoverageRelationStatistics Valid=145, Invalid=730, Unknown=19, NotChecked=366, Total=1260 [2022-04-06 08:13:47,042 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 08:13:47,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 427 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 08:13:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 08:13:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-04-06 08:13:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 08:13:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-04-06 08:13:47,044 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2022-04-06 08:13:47,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:13:47,044 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-04-06 08:13:47,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 08:13:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-04-06 08:13:47,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 08:13:47,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:13:47,045 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:13:47,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 08:13:47,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:13:47,250 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:13:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:13:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash -953190739, now seen corresponding path program 3 times [2022-04-06 08:13:47,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:13:47,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36979853] [2022-04-06 08:13:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:13:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:13:47,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:13:47,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390669953] [2022-04-06 08:13:47,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 08:13:47,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:13:47,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:13:47,264 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:13:47,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 08:13:47,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-04-06 08:13:47,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:13:47,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 08:13:47,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:13:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:13:47,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:13:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 08:13:47,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:13:47,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36979853] [2022-04-06 08:13:47,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:13:47,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390669953] [2022-04-06 08:13:47,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390669953] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:13:47,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:13:47,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-04-06 08:13:47,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029748700] [2022-04-06 08:13:47,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:13:47,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 08:13:47,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:13:47,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 08:13:47,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-04-06 08:13:47,824 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-04-06 08:13:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:13:48,105 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2022-04-06 08:13:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 08:13:48,106 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) Word has length 92 [2022-04-06 08:13:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:13:48,107 INFO L225 Difference]: With dead ends: 244 [2022-04-06 08:13:48,107 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 08:13:48,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 08:13:48,108 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 296 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:13:48,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 250 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:13:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 08:13:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 189. [2022-04-06 08:13:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0928571428571427) internal successors, (153), 140 states have internal predecessors, (153), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 08:13:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 201 transitions. [2022-04-06 08:13:48,113 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 201 transitions. Word has length 92 [2022-04-06 08:13:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:13:48,113 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 201 transitions. [2022-04-06 08:13:48,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-04-06 08:13:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 201 transitions. [2022-04-06 08:13:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 08:13:48,114 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:13:48,114 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:13:48,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 08:13:48,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 08:13:48,331 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:13:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:13:48,331 INFO L85 PathProgramCache]: Analyzing trace with hash 138382379, now seen corresponding path program 10 times [2022-04-06 08:13:48,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:13:48,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494381411] [2022-04-06 08:13:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:13:48,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:13:48,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:13:48,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011536310] [2022-04-06 08:13:48,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 08:13:48,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:13:48,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:13:48,338 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:13:48,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 08:13:49,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 08:13:49,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:13:49,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 08:13:49,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:13:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 22 proven. 220 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 08:13:49,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:13:49,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:13:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494381411] [2022-04-06 08:13:49,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:13:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011536310] [2022-04-06 08:13:49,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011536310] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:13:49,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:13:49,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 08:13:49,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269553907] [2022-04-06 08:13:49,987 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:13:49,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 08:13:49,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:13:49,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 08:13:49,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-04-06 08:13:49,988 INFO L87 Difference]: Start difference. First operand 189 states and 201 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 08:13:50,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:13:50,249 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2022-04-06 08:13:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 08:13:50,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2022-04-06 08:13:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:13:50,250 INFO L225 Difference]: With dead ends: 192 [2022-04-06 08:13:50,250 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 08:13:50,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 08:13:50,251 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:13:50,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 532 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:13:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 08:13:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-04-06 08:13:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0857142857142856) internal successors, (152), 140 states have internal predecessors, (152), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 08:13:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 200 transitions. [2022-04-06 08:13:50,254 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 200 transitions. Word has length 98 [2022-04-06 08:13:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:13:50,255 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 200 transitions. [2022-04-06 08:13:50,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 08:13:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 200 transitions. [2022-04-06 08:13:50,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 08:13:50,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:13:50,259 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:13:50,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 08:13:50,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 08:13:50,463 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:13:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:13:50,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1036328716, now seen corresponding path program 11 times [2022-04-06 08:13:50,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:13:50,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151165907] [2022-04-06 08:13:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:13:50,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:13:50,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:13:50,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372356628] [2022-04-06 08:13:50,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 08:13:50,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:13:50,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:13:50,486 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:13:50,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 08:13:51,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-04-06 08:13:51,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:13:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 08:13:51,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:13:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 24 proven. 264 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 08:13:51,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:13:51,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:13:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151165907] [2022-04-06 08:13:51,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:13:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372356628] [2022-04-06 08:13:51,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372356628] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:13:51,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:13:51,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 08:13:51,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326952509] [2022-04-06 08:13:51,421 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:13:51,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 08:13:51,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:13:51,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 08:13:51,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-04-06 08:13:51,421 INFO L87 Difference]: Start difference. First operand 189 states and 200 transitions. Second operand has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 08:13:51,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:13:51,693 INFO L93 Difference]: Finished difference Result 192 states and 202 transitions. [2022-04-06 08:13:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 08:13:51,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2022-04-06 08:13:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:13:51,695 INFO L225 Difference]: With dead ends: 192 [2022-04-06 08:13:51,695 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 08:13:51,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-04-06 08:13:51,696 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 08:13:51,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 600 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 08:13:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 08:13:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-04-06 08:13:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0785714285714285) internal successors, (151), 140 states have internal predecessors, (151), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 08:13:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 199 transitions. [2022-04-06 08:13:51,699 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 199 transitions. Word has length 106 [2022-04-06 08:13:51,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:13:51,700 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 199 transitions. [2022-04-06 08:13:51,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 08:13:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 199 transitions. [2022-04-06 08:13:51,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 08:13:51,700 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:13:51,700 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:13:51,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 08:13:51,905 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 08:13:51,906 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:13:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:13:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1975402733, now seen corresponding path program 12 times [2022-04-06 08:13:51,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:13:51,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454882975] [2022-04-06 08:13:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:13:51,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:13:51,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:13:51,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002154394] [2022-04-06 08:13:51,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 08:13:51,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:13:51,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:13:51,912 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:13:51,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 08:13:52,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 08:13:52,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:13:52,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 08:13:52,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:13:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 26 proven. 312 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 08:13:52,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:13:52,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:13:52,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454882975] [2022-04-06 08:13:52,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:13:52,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002154394] [2022-04-06 08:13:52,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002154394] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:13:52,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:13:52,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 08:13:52,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364952960] [2022-04-06 08:13:52,832 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:13:52,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 08:13:52,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:13:52,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 08:13:52,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-04-06 08:13:52,833 INFO L87 Difference]: Start difference. First operand 189 states and 199 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 08:13:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:13:53,132 INFO L93 Difference]: Finished difference Result 192 states and 201 transitions. [2022-04-06 08:13:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 08:13:53,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2022-04-06 08:13:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:13:53,133 INFO L225 Difference]: With dead ends: 192 [2022-04-06 08:13:53,133 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 08:13:53,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-04-06 08:13:53,134 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 2 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 08:13:53,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 672 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 08:13:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 08:13:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-04-06 08:13:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0714285714285714) internal successors, (150), 140 states have internal predecessors, (150), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 08:13:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 198 transitions. [2022-04-06 08:13:53,137 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 198 transitions. Word has length 114 [2022-04-06 08:13:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:13:53,137 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 198 transitions. [2022-04-06 08:13:53,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 08:13:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 198 transitions. [2022-04-06 08:13:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 08:13:53,138 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:13:53,138 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:13:53,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-04-06 08:13:53,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:13:53,343 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:13:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:13:53,343 INFO L85 PathProgramCache]: Analyzing trace with hash -953421362, now seen corresponding path program 13 times [2022-04-06 08:13:53,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:13:53,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093989893] [2022-04-06 08:13:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:13:53,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:13:53,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:13:53,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015211809] [2022-04-06 08:13:53,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 08:13:53,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:13:53,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:13:53,376 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:13:53,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 08:13:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:13:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 08:13:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:13:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 66 proven. 365 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 08:13:54,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:13:59,011 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-04-06 08:14:01,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:14:01,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093989893] [2022-04-06 08:14:01,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:14:01,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015211809] [2022-04-06 08:14:01,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015211809] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:14:01,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:14:01,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-06 08:14:01,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270536745] [2022-04-06 08:14:01,031 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:14:01,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 08:14:01,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:14:01,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 08:14:01,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=539, Unknown=1, NotChecked=46, Total=650 [2022-04-06 08:14:01,032 INFO L87 Difference]: Start difference. First operand 189 states and 198 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 08:14:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:14:01,499 INFO L93 Difference]: Finished difference Result 192 states and 200 transitions. [2022-04-06 08:14:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 08:14:01,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2022-04-06 08:14:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:14:01,501 INFO L225 Difference]: With dead ends: 192 [2022-04-06 08:14:01,501 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 08:14:01,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=84, Invalid=675, Unknown=1, NotChecked=52, Total=812 [2022-04-06 08:14:01,501 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 7 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 08:14:01,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 689 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 08:14:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 08:14:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-04-06 08:14:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0642857142857143) internal successors, (149), 140 states have internal predecessors, (149), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 08:14:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 197 transitions. [2022-04-06 08:14:01,506 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 197 transitions. Word has length 122 [2022-04-06 08:14:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:14:01,507 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 197 transitions. [2022-04-06 08:14:01,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 08:14:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 197 transitions. [2022-04-06 08:14:01,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-04-06 08:14:01,508 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:14:01,508 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:14:01,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-04-06 08:14:01,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:14:01,713 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:14:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:14:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1206963793, now seen corresponding path program 14 times [2022-04-06 08:14:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:14:01,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302153370] [2022-04-06 08:14:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:14:01,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:14:01,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:14:01,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682323352] [2022-04-06 08:14:01,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 08:14:01,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:14:01,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:14:01,730 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:14:01,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 08:14:02,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 08:14:02,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:14:02,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 08:14:02,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:14:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 30 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 08:14:03,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:14:03,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:14:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302153370] [2022-04-06 08:14:03,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:14:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682323352] [2022-04-06 08:14:03,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682323352] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:14:03,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:14:03,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-04-06 08:14:03,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721888520] [2022-04-06 08:14:03,248 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:14:03,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 08:14:03,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:14:03,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 08:14:03,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-04-06 08:14:03,249 INFO L87 Difference]: Start difference. First operand 189 states and 197 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 08:14:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:14:03,629 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2022-04-06 08:14:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 08:14:03,632 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2022-04-06 08:14:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:14:03,632 INFO L225 Difference]: With dead ends: 192 [2022-04-06 08:14:03,632 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 08:14:03,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-04-06 08:14:03,633 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 08:14:03,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 828 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 08:14:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 08:14:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-04-06 08:14:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0571428571428572) internal successors, (148), 140 states have internal predecessors, (148), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 08:14:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 196 transitions. [2022-04-06 08:14:03,636 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 196 transitions. Word has length 130 [2022-04-06 08:14:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:14:03,637 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 196 transitions. [2022-04-06 08:14:03,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 08:14:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 196 transitions. [2022-04-06 08:14:03,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 08:14:03,637 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:14:03,638 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:14:03,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 08:14:03,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 08:14:03,838 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:14:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:14:03,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1030291600, now seen corresponding path program 15 times [2022-04-06 08:14:03,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:14:03,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201831718] [2022-04-06 08:14:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:14:03,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:14:03,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:14:03,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140461828] [2022-04-06 08:14:03,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 08:14:03,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:14:03,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:14:03,859 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:14:03,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 08:14:04,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-04-06 08:14:04,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:14:04,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 08:14:04,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:14:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 32 proven. 480 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 08:14:05,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:14:06,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:14:06,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201831718] [2022-04-06 08:14:06,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:14:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140461828] [2022-04-06 08:14:06,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140461828] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:14:06,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:14:06,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-06 08:14:06,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637380923] [2022-04-06 08:14:06,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:14:06,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 08:14:06,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:14:06,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 08:14:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 08:14:06,458 INFO L87 Difference]: Start difference. First operand 189 states and 196 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 08:14:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:14:06,984 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2022-04-06 08:14:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 08:14:06,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2022-04-06 08:14:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:14:06,987 INFO L225 Difference]: With dead ends: 192 [2022-04-06 08:14:06,987 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 08:14:06,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 08:14:06,988 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 08:14:06,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 912 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 08:14:06,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 08:14:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-04-06 08:14:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.05) internal successors, (147), 140 states have internal predecessors, (147), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 08:14:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2022-04-06 08:14:06,991 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 138 [2022-04-06 08:14:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:14:06,991 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2022-04-06 08:14:06,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 08:14:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2022-04-06 08:14:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 08:14:06,992 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:14:06,992 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:14:07,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 08:14:07,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 08:14:07,200 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:14:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:14:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1153802639, now seen corresponding path program 16 times [2022-04-06 08:14:07,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:14:07,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125467884] [2022-04-06 08:14:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:14:07,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:14:07,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:14:07,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221477310] [2022-04-06 08:14:07,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 08:14:07,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:14:07,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:14:07,215 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:14:07,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 08:14:08,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 08:14:08,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:14:08,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 08:14:08,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:14:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 34 proven. 544 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 08:14:08,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:14:08,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:14:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125467884] [2022-04-06 08:14:08,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:14:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221477310] [2022-04-06 08:14:08,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221477310] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:14:08,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:14:08,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-04-06 08:14:08,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820917875] [2022-04-06 08:14:08,608 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:14:08,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 08:14:08,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:14:08,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 08:14:08,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-04-06 08:14:08,609 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 08:14:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:14:09,090 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2022-04-06 08:14:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 08:14:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2022-04-06 08:14:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:14:09,092 INFO L225 Difference]: With dead ends: 192 [2022-04-06 08:14:09,092 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 08:14:09,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-04-06 08:14:09,092 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 08:14:09,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1000 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 08:14:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 08:14:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-04-06 08:14:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.042857142857143) internal successors, (146), 140 states have internal predecessors, (146), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 08:14:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2022-04-06 08:14:09,096 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 146 [2022-04-06 08:14:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:14:09,097 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2022-04-06 08:14:09,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 08:14:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2022-04-06 08:14:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-04-06 08:14:09,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:14:09,098 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:14:09,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 08:14:09,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:14:09,299 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:14:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:14:09,299 INFO L85 PathProgramCache]: Analyzing trace with hash 75778898, now seen corresponding path program 17 times [2022-04-06 08:14:09,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:14:09,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861068076] [2022-04-06 08:14:09,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:14:09,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:14:09,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:14:09,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91007417] [2022-04-06 08:14:09,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 08:14:09,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:14:09,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:14:09,323 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:14:09,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process