/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 18:20:27,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 18:20:27,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 18:20:27,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 18:20:27,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 18:20:27,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 18:20:27,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 18:20:27,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 18:20:27,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 18:20:27,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 18:20:27,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 18:20:27,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 18:20:27,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 18:20:27,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 18:20:27,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 18:20:27,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 18:20:27,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 18:20:27,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 18:20:27,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 18:20:27,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 18:20:27,630 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 18:20:27,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 18:20:27,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 18:20:27,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 18:20:27,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 18:20:27,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 18:20:27,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 18:20:27,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 18:20:27,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 18:20:27,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 18:20:27,658 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 18:20:27,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 18:20:27,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 18:20:27,660 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 18:20:27,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 18:20:27,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 18:20:27,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 18:20:27,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 18:20:27,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 18:20:27,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 18:20:27,662 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 18:20:27,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 18:20:27,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 18:20:27,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 18:20:27,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 18:20:27,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 18:20:27,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 18:20:27,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 18:20:27,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:20:27,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 18:20:27,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 18:20:27,664 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 18:20:27,664 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 18:20:27,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 18:20:27,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 18:20:27,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 18:20:27,879 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 18:20:27,879 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 18:20:27,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-03-17 18:20:27,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1566562fc/d4d5593a72264f9387ea7edd925258cf/FLAG7cc4b25f9 [2022-03-17 18:20:28,253 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 18:20:28,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-03-17 18:20:28,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1566562fc/d4d5593a72264f9387ea7edd925258cf/FLAG7cc4b25f9 [2022-03-17 18:20:28,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1566562fc/d4d5593a72264f9387ea7edd925258cf [2022-03-17 18:20:28,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 18:20:28,269 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 18:20:28,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 18:20:28,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 18:20:28,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 18:20:28,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163a06ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28, skipping insertion in model container [2022-03-17 18:20:28,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 18:20:28,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 18:20:28,420 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_valuebound50.c[458,471] [2022-03-17 18:20:28,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:20:28,438 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 18:20:28,446 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_valuebound50.c[458,471] [2022-03-17 18:20:28,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:20:28,461 INFO L208 MainTranslator]: Completed translation [2022-03-17 18:20:28,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28 WrapperNode [2022-03-17 18:20:28,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 18:20:28,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 18:20:28,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 18:20:28,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 18:20:28,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 18:20:28,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 18:20:28,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 18:20:28,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 18:20:28,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:20:28,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:28,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 18:20:28,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 18:20:28,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 18:20:28,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 18:20:28,574 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 18:20:28,574 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 18:20:28,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 18:20:28,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 18:20:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 18:20:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 18:20:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 18:20:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 18:20:28,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-17 18:20:28,576 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 18:20:28,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 18:20:28,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 18:20:28,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 18:20:28,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 18:20:28,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 18:20:28,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 18:20:28,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 18:20:28,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 18:20:28,635 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 18:20:28,637 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 18:20:28,762 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 18:20:28,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 18:20:28,767 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 18:20:28,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:20:28 BoogieIcfgContainer [2022-03-17 18:20:28,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 18:20:28,777 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 18:20:28,777 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 18:20:28,778 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 18:20:28,781 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:20:28" (1/1) ... [2022-03-17 18:20:28,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:20:28 BasicIcfg [2022-03-17 18:20:28,811 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 18:20:28,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 18:20:28,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 18:20:28,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 18:20:28,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:20:28" (1/4) ... [2022-03-17 18:20:28,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9023f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:20:28, skipping insertion in model container [2022-03-17 18:20:28,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:28" (2/4) ... [2022-03-17 18:20:28,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9023f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:20:28, skipping insertion in model container [2022-03-17 18:20:28,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:20:28" (3/4) ... [2022-03-17 18:20:28,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9023f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:20:28, skipping insertion in model container [2022-03-17 18:20:28,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:20:28" (4/4) ... [2022-03-17 18:20:28,817 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound50.cJordan [2022-03-17 18:20:28,821 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 18:20:28,821 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 18:20:28,853 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 18:20:28,858 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 18:20:28,858 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 18:20:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 18:20:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 18:20:28,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:28,874 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:28,874 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:28,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2022-03-17 18:20:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:28,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207251441] [2022-03-17 18:20:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:28,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:20:29,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:20:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:20:29,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 18:20:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:20:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:20:29,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:29,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207251441] [2022-03-17 18:20:29,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207251441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:20:29,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:20:29,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 18:20:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324220147] [2022-03-17 18:20:29,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:20:29,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 18:20:29,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 18:20:29,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 18:20:29,121 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 18:20:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:29,181 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-17 18:20:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 18:20:29,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 18:20:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:29,197 INFO L225 Difference]: With dead ends: 28 [2022-03-17 18:20:29,197 INFO L226 Difference]: Without dead ends: 23 [2022-03-17 18:20:29,198 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 18:20:29,206 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:29,207 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:20:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-17 18:20:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-17 18:20:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 18:20:29,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-17 18:20:29,244 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-03-17 18:20:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:29,245 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-17 18:20:29,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 18:20:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-17 18:20:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 18:20:29,246 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:29,246 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:29,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 18:20:29,247 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:29,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:29,248 INFO L85 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2022-03-17 18:20:29,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:29,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974896641] [2022-03-17 18:20:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:29,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:29,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:29,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447622998] [2022-03-17 18:20:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:29,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:29,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:29,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:29,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 18:20:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:20:29,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 18:20:29,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:20:29,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 18:20:29,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:29,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974896641] [2022-03-17 18:20:29,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:29,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447622998] [2022-03-17 18:20:29,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447622998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:20:29,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:20:29,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 18:20:29,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675474900] [2022-03-17 18:20:29,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:20:29,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:20:29,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:29,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:20:29,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:20:29,471 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 18:20:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:29,505 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-17 18:20:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 18:20:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 18:20:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:29,507 INFO L225 Difference]: With dead ends: 32 [2022-03-17 18:20:29,507 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 18:20:29,507 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 18:20:29,508 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:29,509 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:20:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 18:20:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 18:20:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 18:20:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-17 18:20:29,515 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-17 18:20:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:29,515 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-17 18:20:29,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 18:20:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-17 18:20:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 18:20:29,516 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:29,516 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:29,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:29,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:29,724 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:29,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:29,724 INFO L85 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2022-03-17 18:20:29,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:29,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611089094] [2022-03-17 18:20:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:29,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:29,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:29,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927416903] [2022-03-17 18:20:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:29,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:29,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:29,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:29,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 18:20:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:20:29,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 18:20:29,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:20:29,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 18:20:30,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:30,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611089094] [2022-03-17 18:20:30,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:30,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927416903] [2022-03-17 18:20:30,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927416903] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:30,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:30,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-17 18:20:30,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68560287] [2022-03-17 18:20:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:20:30,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:20:30,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:30,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:20:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 18:20:30,287 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 18:20:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:30,315 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-03-17 18:20:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 18:20:30,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-17 18:20:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:30,316 INFO L225 Difference]: With dead ends: 34 [2022-03-17 18:20:30,316 INFO L226 Difference]: Without dead ends: 31 [2022-03-17 18:20:30,317 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 18:20:30,318 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:30,318 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:20:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-17 18:20:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-17 18:20:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 18:20:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-17 18:20:30,322 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-03-17 18:20:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:30,322 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-17 18:20:30,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 18:20:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-17 18:20:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 18:20:30,323 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:30,323 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:30,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:30,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 18:20:30,540 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2022-03-17 18:20:30,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:30,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189093045] [2022-03-17 18:20:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:30,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:30,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:30,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450823418] [2022-03-17 18:20:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:30,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:30,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:30,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:30,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 18:20:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:20:30,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 18:20:30,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 18:20:30,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:30,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:30,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189093045] [2022-03-17 18:20:30,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:30,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450823418] [2022-03-17 18:20:30,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450823418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:30,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:30,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-17 18:20:30,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314177168] [2022-03-17 18:20:30,965 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:30,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 18:20:30,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 18:20:30,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-17 18:20:30,966 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 18:20:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:31,039 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-03-17 18:20:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 18:20:31,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-03-17 18:20:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:31,041 INFO L225 Difference]: With dead ends: 37 [2022-03-17 18:20:31,041 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 18:20:31,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-17 18:20:31,045 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:31,047 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:20:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 18:20:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-17 18:20:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 18:20:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-17 18:20:31,058 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-03-17 18:20:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:31,058 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-17 18:20:31,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 18:20:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-17 18:20:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 18:20:31,060 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:31,060 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:31,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:31,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:31,272 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2022-03-17 18:20:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785445424] [2022-03-17 18:20:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:31,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:31,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:31,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104405909] [2022-03-17 18:20:31,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 18:20:31,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:31,288 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:31,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 18:20:31,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 18:20:31,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:20:31,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-17 18:20:31,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:20:31,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:31,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:31,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785445424] [2022-03-17 18:20:31,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:31,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104405909] [2022-03-17 18:20:31,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104405909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:31,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:31,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-17 18:20:31,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847633386] [2022-03-17 18:20:31,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:31,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 18:20:31,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 18:20:31,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 18:20:31,741 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 18:20:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:31,804 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-03-17 18:20:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 18:20:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-17 18:20:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:31,805 INFO L225 Difference]: With dead ends: 40 [2022-03-17 18:20:31,805 INFO L226 Difference]: Without dead ends: 37 [2022-03-17 18:20:31,806 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-17 18:20:31,806 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:31,807 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:20:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-17 18:20:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-17 18:20:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 18:20:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-17 18:20:31,810 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-03-17 18:20:31,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:31,811 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-17 18:20:31,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 18:20:31,811 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-17 18:20:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 18:20:31,812 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:31,812 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:31,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:32,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:32,031 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:32,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2022-03-17 18:20:32,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:32,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697028285] [2022-03-17 18:20:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:32,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:32,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:32,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224701000] [2022-03-17 18:20:32,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 18:20:32,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:32,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:32,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:32,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 18:20:32,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 18:20:32,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:20:32,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 18:20:32,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 18:20:32,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:32,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:32,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697028285] [2022-03-17 18:20:32,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:32,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224701000] [2022-03-17 18:20:32,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224701000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:32,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:32,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-17 18:20:32,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156925593] [2022-03-17 18:20:32,526 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:32,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 18:20:32,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 18:20:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-17 18:20:32,528 INFO L87 Difference]: Start difference. First operand 37 states and 39 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-17 18:20:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:32,608 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-03-17 18:20:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 18:20:32,608 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-03-17 18:20:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:32,609 INFO L225 Difference]: With dead ends: 43 [2022-03-17 18:20:32,609 INFO L226 Difference]: Without dead ends: 40 [2022-03-17 18:20:32,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-17 18:20:32,610 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:32,610 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:20:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-17 18:20:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-17 18:20:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 18:20:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-17 18:20:32,614 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-03-17 18:20:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:32,614 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-17 18:20:32,614 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-17 18:20:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-17 18:20:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 18:20:32,615 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:32,615 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:32,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:32,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:32,821 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:32,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2022-03-17 18:20:32,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:32,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023997274] [2022-03-17 18:20:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:32,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:32,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:32,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283575849] [2022-03-17 18:20:32,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 18:20:32,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:32,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:32,834 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:32,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 18:20:33,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 18:20:33,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:20:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-17 18:20:33,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 18:20:33,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:33,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023997274] [2022-03-17 18:20:33,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283575849] [2022-03-17 18:20:33,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283575849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:33,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:33,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-17 18:20:33,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361657927] [2022-03-17 18:20:33,508 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:33,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 18:20:33,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:33,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 18:20:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-17 18:20:33,509 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-17 18:20:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:33,642 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-03-17 18:20:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 18:20:33,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-03-17 18:20:33,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:33,643 INFO L225 Difference]: With dead ends: 46 [2022-03-17 18:20:33,643 INFO L226 Difference]: Without dead ends: 43 [2022-03-17 18:20:33,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-17 18:20:33,644 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:33,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:20:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-17 18:20:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-17 18:20:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 18:20:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-17 18:20:33,648 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-03-17 18:20:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:33,649 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-17 18:20:33,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-17 18:20:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-17 18:20:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-17 18:20:33,650 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:33,650 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:33,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:33,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:33,860 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:33,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2022-03-17 18:20:33,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:33,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635015504] [2022-03-17 18:20:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:33,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:33,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:33,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718235390] [2022-03-17 18:20:33,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 18:20:33,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:33,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:33,871 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:33,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 18:20:34,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-17 18:20:34,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:20:34,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 18:20:34,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 18:20:34,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:34,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635015504] [2022-03-17 18:20:34,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718235390] [2022-03-17 18:20:34,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718235390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:34,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:34,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-17 18:20:34,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094708621] [2022-03-17 18:20:34,393 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:34,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 18:20:34,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:34,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 18:20:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-17 18:20:34,394 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-17 18:20:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:34,512 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-03-17 18:20:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 18:20:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-03-17 18:20:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:34,514 INFO L225 Difference]: With dead ends: 49 [2022-03-17 18:20:34,514 INFO L226 Difference]: Without dead ends: 46 [2022-03-17 18:20:34,514 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-17 18:20:34,514 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:34,515 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:20:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-17 18:20:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-17 18:20:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 18:20:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-17 18:20:34,518 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-03-17 18:20:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:34,519 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-17 18:20:34,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-17 18:20:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-17 18:20:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-17 18:20:34,519 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:34,520 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:34,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 18:20:34,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:34,727 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:34,727 INFO L85 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2022-03-17 18:20:34,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:34,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235572509] [2022-03-17 18:20:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:34,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:34,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:34,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941921456] [2022-03-17 18:20:34,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 18:20:34,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:34,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:34,738 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:34,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 18:20:34,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-17 18:20:34,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:20:34,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-17 18:20:34,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 18:20:35,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:35,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:35,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235572509] [2022-03-17 18:20:35,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:35,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941921456] [2022-03-17 18:20:35,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941921456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:35,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:35,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-17 18:20:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002744761] [2022-03-17 18:20:35,314 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:35,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 18:20:35,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 18:20:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-17 18:20:35,315 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-17 18:20:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:35,460 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-03-17 18:20:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 18:20:35,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2022-03-17 18:20:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:35,464 INFO L225 Difference]: With dead ends: 52 [2022-03-17 18:20:35,464 INFO L226 Difference]: Without dead ends: 49 [2022-03-17 18:20:35,465 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-17 18:20:35,466 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:35,467 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 349 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:20:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-17 18:20:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-17 18:20:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 18:20:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-03-17 18:20:35,476 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-03-17 18:20:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:35,476 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-03-17 18:20:35,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-17 18:20:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-03-17 18:20:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 18:20:35,483 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:35,483 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:35,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:35,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 18:20:35,689 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:35,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash 4292050, now seen corresponding path program 7 times [2022-03-17 18:20:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:35,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729498113] [2022-03-17 18:20:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:35,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:35,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322729876] [2022-03-17 18:20:35,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 18:20:35,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:35,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:35,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:35,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 18:20:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:20:36,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-17 18:20:36,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 18:20:36,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:36,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:36,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729498113] [2022-03-17 18:20:36,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:36,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322729876] [2022-03-17 18:20:36,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322729876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:36,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:36,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-17 18:20:36,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045346291] [2022-03-17 18:20:36,580 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:36,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 18:20:36,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:36,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 18:20:36,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-17 18:20:36,581 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-17 18:20:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:36,739 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-03-17 18:20:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 18:20:36,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2022-03-17 18:20:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:36,740 INFO L225 Difference]: With dead ends: 55 [2022-03-17 18:20:36,740 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 18:20:36,741 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-17 18:20:36,741 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:36,741 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:20:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 18:20:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-17 18:20:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 18:20:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-17 18:20:36,746 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-03-17 18:20:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:36,746 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-17 18:20:36,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-17 18:20:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-17 18:20:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-17 18:20:36,747 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:36,747 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:36,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:36,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 18:20:36,953 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:36,953 INFO L85 PathProgramCache]: Analyzing trace with hash 395442112, now seen corresponding path program 8 times [2022-03-17 18:20:36,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:36,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131652033] [2022-03-17 18:20:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:36,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:36,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:36,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011391633] [2022-03-17 18:20:36,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 18:20:36,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:36,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:36,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:36,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 18:20:37,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 18:20:37,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:20:37,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-17 18:20:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-17 18:20:37,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:38,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:38,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131652033] [2022-03-17 18:20:38,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:38,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011391633] [2022-03-17 18:20:38,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011391633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:38,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:38,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-17 18:20:38,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142425813] [2022-03-17 18:20:38,031 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:38,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 18:20:38,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:38,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 18:20:38,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-17 18:20:38,032 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-17 18:20:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:38,216 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-03-17 18:20:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 18:20:38,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2022-03-17 18:20:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:38,219 INFO L225 Difference]: With dead ends: 58 [2022-03-17 18:20:38,219 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 18:20:38,219 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-17 18:20:38,219 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:38,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 465 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 18:20:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 18:20:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-17 18:20:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 18:20:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-17 18:20:38,224 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-03-17 18:20:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:38,224 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-17 18:20:38,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-17 18:20:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-17 18:20:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-17 18:20:38,225 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:38,225 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:38,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:38,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 18:20:38,433 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash 667883026, now seen corresponding path program 9 times [2022-03-17 18:20:38,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:38,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244757099] [2022-03-17 18:20:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:38,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:38,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:38,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367555358] [2022-03-17 18:20:38,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 18:20:38,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:38,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:38,454 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:38,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 18:20:38,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-17 18:20:38,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:20:38,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-17 18:20:38,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-17 18:20:39,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:39,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:39,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244757099] [2022-03-17 18:20:39,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:39,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367555358] [2022-03-17 18:20:39,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367555358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:39,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:39,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-17 18:20:39,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579992672] [2022-03-17 18:20:39,548 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:39,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-17 18:20:39,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-17 18:20:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-17 18:20:39,550 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-17 18:20:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:39,750 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-03-17 18:20:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 18:20:39,750 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2022-03-17 18:20:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:39,751 INFO L225 Difference]: With dead ends: 61 [2022-03-17 18:20:39,751 INFO L226 Difference]: Without dead ends: 58 [2022-03-17 18:20:39,751 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-17 18:20:39,752 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:39,752 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 529 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 18:20:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-17 18:20:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-17 18:20:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 18:20:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-03-17 18:20:39,757 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-03-17 18:20:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:39,758 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-03-17 18:20:39,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-17 18:20:39,758 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-03-17 18:20:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 18:20:39,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:39,758 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:39,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:39,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 18:20:39,959 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1918146432, now seen corresponding path program 10 times [2022-03-17 18:20:39,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:39,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699745032] [2022-03-17 18:20:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:39,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:39,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:39,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976109651] [2022-03-17 18:20:39,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 18:20:39,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:39,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:39,969 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:39,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 18:20:40,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 18:20:40,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:20:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-17 18:20:40,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 18:20:40,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:40,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699745032] [2022-03-17 18:20:40,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976109651] [2022-03-17 18:20:40,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976109651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:40,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:40,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-17 18:20:40,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963877028] [2022-03-17 18:20:40,955 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:40,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 18:20:40,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 18:20:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-17 18:20:40,956 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-17 18:20:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:41,190 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-03-17 18:20:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 18:20:41,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2022-03-17 18:20:41,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:41,191 INFO L225 Difference]: With dead ends: 64 [2022-03-17 18:20:41,192 INFO L226 Difference]: Without dead ends: 61 [2022-03-17 18:20:41,192 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-17 18:20:41,192 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:41,192 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 597 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 18:20:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-17 18:20:41,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-17 18:20:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-17 18:20:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-03-17 18:20:41,197 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-03-17 18:20:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:41,197 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-03-17 18:20:41,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-17 18:20:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-03-17 18:20:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-17 18:20:41,198 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:41,198 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:41,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:41,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 18:20:41,404 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1384988242, now seen corresponding path program 11 times [2022-03-17 18:20:41,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:41,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529058073] [2022-03-17 18:20:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:41,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:41,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:41,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867157920] [2022-03-17 18:20:41,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 18:20:41,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:41,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:41,415 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:41,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 18:20:42,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-17 18:20:42,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:20:42,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-17 18:20:42,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-17 18:20:42,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:20:43,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:20:43,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529058073] [2022-03-17 18:20:43,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:20:43,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867157920] [2022-03-17 18:20:43,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867157920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:20:43,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:20:43,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-17 18:20:43,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214477837] [2022-03-17 18:20:43,208 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:20:43,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 18:20:43,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:20:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 18:20:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-03-17 18:20:43,209 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-17 18:20:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:20:43,486 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-03-17 18:20:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 18:20:43,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-03-17 18:20:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:20:43,487 INFO L225 Difference]: With dead ends: 67 [2022-03-17 18:20:43,487 INFO L226 Difference]: Without dead ends: 64 [2022-03-17 18:20:43,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-03-17 18:20:43,488 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 18:20:43,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 669 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 18:20:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-17 18:20:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-17 18:20:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 18:20:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-17 18:20:43,493 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-03-17 18:20:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:20:43,493 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-17 18:20:43,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-17 18:20:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-17 18:20:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-17 18:20:43,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:20:43,495 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:20:43,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 18:20:43,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 18:20:43,700 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:20:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:20:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2099554112, now seen corresponding path program 12 times [2022-03-17 18:20:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:20:43,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829488952] [2022-03-17 18:20:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:20:43,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:20:43,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:20:43,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79260414] [2022-03-17 18:20:43,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 18:20:43,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:20:43,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:20:43,715 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:20:43,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 18:20:43,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-17 18:20:43,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:20:43,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-17 18:20:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:20:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 90 proven. 236 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-17 18:20:44,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:23:14,409 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 6 c_main_~y~0))) (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0))) 4) 0)) (forall ((main_~k~0 Int)) (or (<= main_~k~0 (+ 6 c_main_~c~0)) (< (+ 7 c_main_~c~0) main_~k~0) (= (+ (* 7 main_~k~0) (* main_~k~0 c_main_~y~0)) (+ (* 14 c_main_~y~0) 49 (* c_main_~y~0 c_main_~y~0)))))) is different from false [2022-03-17 18:23:16,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:23:16,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829488952] [2022-03-17 18:23:16,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:23:16,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79260414] [2022-03-17 18:23:16,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79260414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:23:16,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:23:16,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-17 18:23:16,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889991617] [2022-03-17 18:23:16,427 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:23:16,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 18:23:16,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:23:16,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 18:23:16,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=874, Unknown=8, NotChecked=62, Total=1122 [2022-03-17 18:23:16,428 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-17 18:23:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:23:16,836 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-03-17 18:23:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 18:23:16,836 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2022-03-17 18:23:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:23:16,837 INFO L225 Difference]: With dead ends: 70 [2022-03-17 18:23:16,837 INFO L226 Difference]: Without dead ends: 67 [2022-03-17 18:23:16,838 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 111.7s TimeCoverageRelationStatistics Valid=199, Invalid=1057, Unknown=8, NotChecked=68, Total=1332 [2022-03-17 18:23:16,838 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 18:23:16,838 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 748 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 18:23:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-17 18:23:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-17 18:23:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 18:23:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-17 18:23:16,842 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-03-17 18:23:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:23:16,843 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-17 18:23:16,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-17 18:23:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-17 18:23:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-17 18:23:16,844 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:23:16,844 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:23:16,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 18:23:17,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:23:17,045 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:23:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:23:17,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1740638574, now seen corresponding path program 13 times [2022-03-17 18:23:17,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:23:17,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175120231] [2022-03-17 18:23:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:23:17,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:23:17,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:23:17,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617719320] [2022-03-17 18:23:17,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 18:23:17,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:23:17,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:23:17,055 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:23:17,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 18:23:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:23:17,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-17 18:23:17,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:23:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 98 proven. 275 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-17 18:23:18,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:23:22,648 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 (<= (+ (* 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))) (div (+ .cse1 .cse2 .cse3 (- 4)) (- 4)))) (not (= (mod (+ .cse1 .cse2 .cse3) 4) 0)))) is different from false [2022-03-17 18:23:26,701 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 (+ (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 13) c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-03-17 18:23:26,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:23:26,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175120231] [2022-03-17 18:23:26,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:23:26,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617719320] [2022-03-17 18:23:26,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617719320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:23:26,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:23:26,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-17 18:23:26,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802050193] [2022-03-17 18:23:26,716 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:23:26,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 18:23:26,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:23:26,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 18:23:26,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=634, Unknown=2, NotChecked=102, Total=812 [2022-03-17 18:23:26,718 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-17 18:23:27,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:23:27,168 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-03-17 18:23:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-17 18:23:27,169 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2022-03-17 18:23:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:23:27,169 INFO L225 Difference]: With dead ends: 73 [2022-03-17 18:23:27,170 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 18:23:27,170 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=95, Invalid=781, Unknown=2, NotChecked=114, Total=992 [2022-03-17 18:23:27,170 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 18:23:27,171 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 826 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 18:23:27,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 18:23:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-17 18:23:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 18:23:27,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-03-17 18:23:27,176 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-03-17 18:23:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:23:27,176 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-03-17 18:23:27,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-17 18:23:27,177 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-03-17 18:23:27,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-17 18:23:27,178 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:23:27,178 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:23:27,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 18:23:27,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 18:23:27,385 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:23:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:23:27,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1682036992, now seen corresponding path program 14 times [2022-03-17 18:23:27,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:23:27,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014824440] [2022-03-17 18:23:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:23:27,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:23:27,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:23:27,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521385110] [2022-03-17 18:23:27,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 18:23:27,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:23:27,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:23:27,394 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) [2022-03-17 18:23:27,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 18:23:27,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 18:23:27,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:23:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-17 18:23:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:23:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-17 18:23:28,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:23:28,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:23:28,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014824440] [2022-03-17 18:23:28,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:23:28,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521385110] [2022-03-17 18:23:28,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521385110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:23:28,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:23:28,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-17 18:23:28,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940438167] [2022-03-17 18:23:28,492 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:23:28,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 18:23:28,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:23:28,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 18:23:28,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-17 18:23:28,493 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-17 18:23:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:23:28,818 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2022-03-17 18:23:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-17 18:23:28,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2022-03-17 18:23:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:23:28,819 INFO L225 Difference]: With dead ends: 76 [2022-03-17 18:23:28,819 INFO L226 Difference]: Without dead ends: 73 [2022-03-17 18:23:28,820 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-17 18:23:28,820 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 18:23:28,820 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 909 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 18:23:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-17 18:23:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-17 18:23:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 20 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-17 18:23:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-03-17 18:23:28,824 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-03-17 18:23:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:23:28,825 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-03-17 18:23:28,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-17 18:23:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-03-17 18:23:28,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-17 18:23:28,826 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:23:28,826 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:23:28,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 18:23:29,031 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 [2022-03-17 18:23:29,031 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:23:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:23:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash 699088594, now seen corresponding path program 15 times [2022-03-17 18:23:29,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:23:29,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695517916] [2022-03-17 18:23:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:23:29,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:23:29,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:23:29,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417944958] [2022-03-17 18:23:29,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 18:23:29,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:23:29,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:23:29,041 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) [2022-03-17 18:23:29,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 18:23:29,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-17 18:23:29,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:23:29,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-17 18:23:29,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:23:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-17 18:23:30,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:23:31,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:23:31,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695517916] [2022-03-17 18:23:31,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:23:31,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417944958] [2022-03-17 18:23:31,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417944958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:23:31,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:23:31,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-17 18:23:31,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845566598] [2022-03-17 18:23:31,181 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:23:31,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 18:23:31,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:23:31,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 18:23:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 18:23:31,183 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-17 18:23:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:23:31,576 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-03-17 18:23:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 18:23:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2022-03-17 18:23:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:23:31,577 INFO L225 Difference]: With dead ends: 79 [2022-03-17 18:23:31,577 INFO L226 Difference]: Without dead ends: 76 [2022-03-17 18:23:31,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2022-03-17 18:23:31,578 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 18:23:31,578 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 997 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 18:23:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-17 18:23:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-17 18:23:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 18:23:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-03-17 18:23:31,582 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-03-17 18:23:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:23:31,582 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-03-17 18:23:31,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-17 18:23:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-03-17 18:23:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-17 18:23:31,583 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:23:31,583 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:23:31,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 18:23:31,791 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 [2022-03-17 18:23:31,791 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:23:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:23:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash -119728448, now seen corresponding path program 16 times [2022-03-17 18:23:31,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:23:31,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599814374] [2022-03-17 18:23:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:23:31,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:23:31,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:23:31,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958088630] [2022-03-17 18:23:31,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 18:23:31,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:23:31,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:23:31,800 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) [2022-03-17 18:23:31,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-17 18:23:32,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 18:23:32,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:23:32,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-17 18:23:32,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:23:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 122 proven. 410 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-03-17 18:23:32,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:11,346 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 (= 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)))) is different from false [2022-03-17 18:24:11,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:11,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599814374] [2022-03-17 18:24:11,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:11,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958088630] [2022-03-17 18:24:11,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958088630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:11,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:11,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-17 18:24:11,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111660033] [2022-03-17 18:24:11,348 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:11,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 18:24:11,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:11,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 18:24:11,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=828, Unknown=9, NotChecked=58, Total=992 [2022-03-17 18:24:11,349 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-17 18:24:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:11,906 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-03-17 18:24:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 18:24:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2022-03-17 18:24:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:11,908 INFO L225 Difference]: With dead ends: 82 [2022-03-17 18:24:11,908 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 18:24:11,908 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=118, Invalid=999, Unknown=9, NotChecked=64, Total=1190 [2022-03-17 18:24:11,909 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:11,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1037 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 18:24:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 18:24:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-17 18:24:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-17 18:24:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-03-17 18:24:11,912 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-03-17 18:24:11,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:11,913 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-03-17 18:24:11,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-17 18:24:11,913 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-03-17 18:24:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-17 18:24:11,914 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:11,914 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:11,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:12,120 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 [2022-03-17 18:24:12,120 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:12,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1869408494, now seen corresponding path program 17 times [2022-03-17 18:24:12,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:12,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727856149] [2022-03-17 18:24:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:12,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:12,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:12,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587967421] [2022-03-17 18:24:12,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 18:24:12,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:12,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:12,138 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) [2022-03-17 18:24:12,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-17 18:24:13,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-17 18:24:13,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:24:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-17 18:24:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:24:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-17 18:24:13,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:13,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727856149] [2022-03-17 18:24:13,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587967421] [2022-03-17 18:24:13,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587967421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:13,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:13,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-17 18:24:13,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908166954] [2022-03-17 18:24:13,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:13,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 18:24:13,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:13,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 18:24:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-17 18:24:13,911 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-17 18:24:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:14,370 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-03-17 18:24:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-17 18:24:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2022-03-17 18:24:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:14,371 INFO L225 Difference]: With dead ends: 85 [2022-03-17 18:24:14,371 INFO L226 Difference]: Without dead ends: 82 [2022-03-17 18:24:14,371 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-17 18:24:14,372 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:14,372 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1185 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 18:24:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-17 18:24:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-17 18:24:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 18:24:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-17 18:24:14,375 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-03-17 18:24:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:14,376 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-17 18:24:14,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-17 18:24:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-17 18:24:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-17 18:24:14,377 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:14,377 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:14,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:14,585 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 [2022-03-17 18:24:14,585 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1178433152, now seen corresponding path program 18 times [2022-03-17 18:24:14,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:14,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96256773] [2022-03-17 18:24:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:14,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:14,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:14,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182062580] [2022-03-17 18:24:14,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 18:24:14,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:14,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:14,599 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) [2022-03-17 18:24:14,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-17 18:24:17,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-17 18:24:17,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:24:17,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-17 18:24:17,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:24:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-17 18:24:18,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:19,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:19,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96256773] [2022-03-17 18:24:19,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:19,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182062580] [2022-03-17 18:24:19,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182062580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:19,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:19,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-17 18:24:19,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344803882] [2022-03-17 18:24:19,213 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:19,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 18:24:19,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:19,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 18:24:19,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 18:24:19,215 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-17 18:24:19,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:19,696 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-03-17 18:24:19,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 18:24:19,697 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2022-03-17 18:24:19,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:19,697 INFO L225 Difference]: With dead ends: 88 [2022-03-17 18:24:19,697 INFO L226 Difference]: Without dead ends: 85 [2022-03-17 18:24:19,698 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2022-03-17 18:24:19,698 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:19,699 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1285 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 18:24:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-17 18:24:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-17 18:24:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-17 18:24:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-03-17 18:24:19,702 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-03-17 18:24:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:19,702 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-03-17 18:24:19,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-17 18:24:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-03-17 18:24:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-17 18:24:19,704 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:19,704 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:19,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:19,911 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 [2022-03-17 18:24:19,911 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash -272924846, now seen corresponding path program 19 times [2022-03-17 18:24:19,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:19,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945833025] [2022-03-17 18:24:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:19,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:19,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:19,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442867713] [2022-03-17 18:24:19,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 18:24:19,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:19,924 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) [2022-03-17 18:24:19,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-17 18:24:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:24:20,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-17 18:24:20,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:24:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-17 18:24:21,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:21,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945833025] [2022-03-17 18:24:21,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:21,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442867713] [2022-03-17 18:24:21,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442867713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:21,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:21,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-17 18:24:21,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538497899] [2022-03-17 18:24:21,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:21,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-17 18:24:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-17 18:24:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-17 18:24:21,237 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-17 18:24:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:21,737 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-03-17 18:24:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 18:24:21,738 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2022-03-17 18:24:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:21,739 INFO L225 Difference]: With dead ends: 91 [2022-03-17 18:24:21,739 INFO L226 Difference]: Without dead ends: 88 [2022-03-17 18:24:21,739 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-17 18:24:21,740 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:21,740 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1389 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 18:24:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-17 18:24:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-17 18:24:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 25 states have call successors, (25), 6 states have call predecessors, (25), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-17 18:24:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-03-17 18:24:21,743 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-03-17 18:24:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:21,743 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-03-17 18:24:21,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-17 18:24:21,744 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-03-17 18:24:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-17 18:24:21,745 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:21,745 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:21,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:21,951 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 [2022-03-17 18:24:21,951 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2090550848, now seen corresponding path program 20 times [2022-03-17 18:24:21,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:21,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783170861] [2022-03-17 18:24:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:21,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:21,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:21,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304340365] [2022-03-17 18:24:21,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 18:24:21,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:21,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:21,961 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) [2022-03-17 18:24:21,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-17 18:24:22,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 18:24:22,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:24:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-17 18:24:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:24:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-17 18:24:23,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:23,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:23,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783170861] [2022-03-17 18:24:23,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:23,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304340365] [2022-03-17 18:24:23,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304340365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:23,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:23,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-17 18:24:23,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288794248] [2022-03-17 18:24:23,280 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:23,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 18:24:23,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:23,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 18:24:23,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-17 18:24:23,282 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-17 18:24:23,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:23,847 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2022-03-17 18:24:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-17 18:24:23,847 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 163 [2022-03-17 18:24:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:23,848 INFO L225 Difference]: With dead ends: 94 [2022-03-17 18:24:23,848 INFO L226 Difference]: Without dead ends: 91 [2022-03-17 18:24:23,848 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-03-17 18:24:23,849 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:23,849 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1497 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 18:24:23,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-17 18:24:23,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-17 18:24:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 26 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-17 18:24:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-03-17 18:24:23,852 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 163 [2022-03-17 18:24:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:23,853 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-03-17 18:24:23,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-17 18:24:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-03-17 18:24:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-17 18:24:23,854 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:23,854 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:23,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:24,060 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 [2022-03-17 18:24:24,060 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:24,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1122531218, now seen corresponding path program 21 times [2022-03-17 18:24:24,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:24,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347648437] [2022-03-17 18:24:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:24,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:24,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:24,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739194565] [2022-03-17 18:24:24,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 18:24:24,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:24,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:24,082 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) [2022-03-17 18:24:24,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-17 18:24:24,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-17 18:24:24,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:24:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-17 18:24:24,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:24:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-17 18:24:25,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:25,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:25,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347648437] [2022-03-17 18:24:25,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:25,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739194565] [2022-03-17 18:24:25,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739194565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:25,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:25,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-17 18:24:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129725584] [2022-03-17 18:24:25,597 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:25,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-17 18:24:25,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-17 18:24:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-17 18:24:25,599 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-17 18:24:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:26,217 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-03-17 18:24:26,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-17 18:24:26,217 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2022-03-17 18:24:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:26,218 INFO L225 Difference]: With dead ends: 97 [2022-03-17 18:24:26,218 INFO L226 Difference]: Without dead ends: 94 [2022-03-17 18:24:26,219 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-17 18:24:26,219 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:26,219 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1609 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 18:24:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-17 18:24:26,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-17 18:24:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-17 18:24:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-03-17 18:24:26,223 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 170 [2022-03-17 18:24:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:26,223 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-03-17 18:24:26,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-17 18:24:26,223 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-03-17 18:24:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-17 18:24:26,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:26,224 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:26,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:26,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:26,425 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:26,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1682799104, now seen corresponding path program 22 times [2022-03-17 18:24:26,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:26,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551920786] [2022-03-17 18:24:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:26,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:26,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:26,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553107757] [2022-03-17 18:24:26,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 18:24:26,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:26,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:26,433 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:24:26,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-17 18:24:26,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 18:24:26,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:24:26,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-17 18:24:26,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:24:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-17 18:24:27,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:27,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:27,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551920786] [2022-03-17 18:24:27,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:27,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553107757] [2022-03-17 18:24:27,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553107757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:27,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:27,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-17 18:24:27,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351529454] [2022-03-17 18:24:27,882 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:27,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-17 18:24:27,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-17 18:24:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-17 18:24:27,883 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-17 18:24:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:28,512 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2022-03-17 18:24:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-17 18:24:28,512 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 177 [2022-03-17 18:24:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:28,513 INFO L225 Difference]: With dead ends: 100 [2022-03-17 18:24:28,513 INFO L226 Difference]: Without dead ends: 97 [2022-03-17 18:24:28,513 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-03-17 18:24:28,513 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:28,514 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1725 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 18:24:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-17 18:24:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-17 18:24:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 28 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-17 18:24:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-03-17 18:24:28,523 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 177 [2022-03-17 18:24:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:28,524 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-03-17 18:24:28,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-17 18:24:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-03-17 18:24:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-17 18:24:28,525 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:28,525 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:28,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:28,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-17 18:24:28,726 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:28,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1629618222, now seen corresponding path program 23 times [2022-03-17 18:24:28,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:28,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26286863] [2022-03-17 18:24:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:28,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:28,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:28,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579540954] [2022-03-17 18:24:28,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 18:24:28,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:28,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:28,734 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:24:28,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-17 18:24:48,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-17 18:24:48,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:24:48,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-17 18:24:48,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:24:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-17 18:24:49,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:49,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:49,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26286863] [2022-03-17 18:24:49,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:49,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579540954] [2022-03-17 18:24:49,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579540954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:49,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:49,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-03-17 18:24:49,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136643245] [2022-03-17 18:24:49,739 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:49,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-17 18:24:49,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:49,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-17 18:24:49,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-03-17 18:24:49,740 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-17 18:24:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:50,469 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-03-17 18:24:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-17 18:24:50,469 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 184 [2022-03-17 18:24:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:50,470 INFO L225 Difference]: With dead ends: 103 [2022-03-17 18:24:50,470 INFO L226 Difference]: Without dead ends: 100 [2022-03-17 18:24:50,470 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 18:24:50,471 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:50,471 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1845 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 18:24:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-17 18:24:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-17 18:24:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 29 states have call successors, (29), 6 states have call predecessors, (29), 4 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-17 18:24:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2022-03-17 18:24:50,474 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 184 [2022-03-17 18:24:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:50,475 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2022-03-17 18:24:50,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-17 18:24:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2022-03-17 18:24:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-17 18:24:50,476 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:50,476 INFO L500 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:50,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:50,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-17 18:24:50,687 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:50,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:50,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1782527424, now seen corresponding path program 24 times [2022-03-17 18:24:50,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:50,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901775150] [2022-03-17 18:24:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:50,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:50,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:50,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764826697] [2022-03-17 18:24:50,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 18:24:50,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:50,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:50,696 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:24:50,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-17 18:24:51,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-17 18:24:51,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:24:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-17 18:24:51,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:24:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-17 18:24:52,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:52,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:52,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901775150] [2022-03-17 18:24:52,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:52,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764826697] [2022-03-17 18:24:52,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764826697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:52,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:52,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-03-17 18:24:52,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948310867] [2022-03-17 18:24:52,372 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:52,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-17 18:24:52,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:52,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-17 18:24:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-17 18:24:52,373 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-17 18:24:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:53,131 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2022-03-17 18:24:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-17 18:24:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 191 [2022-03-17 18:24:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:53,132 INFO L225 Difference]: With dead ends: 106 [2022-03-17 18:24:53,132 INFO L226 Difference]: Without dead ends: 103 [2022-03-17 18:24:53,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2022-03-17 18:24:53,133 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:53,133 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1969 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 18:24:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-17 18:24:53,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-17 18:24:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 30 states have call successors, (30), 6 states have call predecessors, (30), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-17 18:24:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-17 18:24:53,136 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 191 [2022-03-17 18:24:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:53,137 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-17 18:24:53,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-17 18:24:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-17 18:24:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-17 18:24:53,138 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:53,138 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:53,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:53,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-17 18:24:53,346 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:53,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1902123026, now seen corresponding path program 25 times [2022-03-17 18:24:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:53,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543409734] [2022-03-17 18:24:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:53,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:53,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:53,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100294927] [2022-03-17 18:24:53,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 18:24:53,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:53,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:53,357 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:24:53,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-17 18:24:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:24:54,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-17 18:24:54,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:24:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-17 18:24:54,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:55,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543409734] [2022-03-17 18:24:55,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100294927] [2022-03-17 18:24:55,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100294927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:55,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:55,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-03-17 18:24:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94512167] [2022-03-17 18:24:55,129 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:55,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-17 18:24:55,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-17 18:24:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 18:24:55,130 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-17 18:24:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:55,915 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-03-17 18:24:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-17 18:24:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) Word has length 198 [2022-03-17 18:24:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:55,917 INFO L225 Difference]: With dead ends: 109 [2022-03-17 18:24:55,917 INFO L226 Difference]: Without dead ends: 106 [2022-03-17 18:24:55,917 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-03-17 18:24:55,917 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:55,917 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2097 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 18:24:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-17 18:24:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-17 18:24:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 31 states have call successors, (31), 6 states have call predecessors, (31), 4 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-17 18:24:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-17 18:24:55,921 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 198 [2022-03-17 18:24:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:55,921 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-17 18:24:55,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-17 18:24:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-17 18:24:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-17 18:24:55,923 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:55,924 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:55,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:56,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-17 18:24:56,131 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:56,131 INFO L85 PathProgramCache]: Analyzing trace with hash 905794944, now seen corresponding path program 26 times [2022-03-17 18:24:56,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:56,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852555098] [2022-03-17 18:24:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:56,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:56,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:56,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165498896] [2022-03-17 18:24:56,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 18:24:56,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:56,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:56,148 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:24:56,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-17 18:24:56,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 18:24:56,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:24:56,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-17 18:24:56,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:24:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-17 18:24:57,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:24:57,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:24:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852555098] [2022-03-17 18:24:57,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:24:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165498896] [2022-03-17 18:24:57,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165498896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:24:57,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:24:57,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-03-17 18:24:57,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242595100] [2022-03-17 18:24:57,754 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:24:57,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-17 18:24:57,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:24:57,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-17 18:24:57,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-03-17 18:24:57,755 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-17 18:24:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:24:58,560 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2022-03-17 18:24:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-17 18:24:58,560 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) Word has length 205 [2022-03-17 18:24:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:24:58,561 INFO L225 Difference]: With dead ends: 112 [2022-03-17 18:24:58,561 INFO L226 Difference]: Without dead ends: 109 [2022-03-17 18:24:58,561 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 18:24:58,562 INFO L912 BasicCegarLoop]: 100 mSDtfsCounter, 2 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-17 18:24:58,562 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2229 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-17 18:24:58,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-17 18:24:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-17 18:24:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 32 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-17 18:24:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-17 18:24:58,566 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 205 [2022-03-17 18:24:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:24:58,566 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-17 18:24:58,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-17 18:24:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-17 18:24:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-17 18:24:58,567 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:24:58,567 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:24:58,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-17 18:24:58,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-17 18:24:58,774 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:24:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:24:58,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1053638574, now seen corresponding path program 27 times [2022-03-17 18:24:58,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:24:58,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421440100] [2022-03-17 18:24:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:24:58,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:24:58,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:24:58,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797138839] [2022-03-17 18:24:58,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 18:24:58,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:24:58,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:24:58,784 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:24:58,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-17 18:25:02,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-17 18:25:02,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:25:02,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 128 conjunts are in the unsatisfiable core [2022-03-17 18:25:02,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:25:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 210 proven. 1136 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2022-03-17 18:25:03,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:26:27,116 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 3 c_main_~y~0))) (or (= (+ (* 2 c_main_~y~0) 7 (* .cse0 .cse0)) (+ (* .cse0 c_main_~k~0) c_main_~k~0)) (< (+ c_main_~c~0 4) c_main_~k~0) (<= c_main_~k~0 (+ 3 c_main_~c~0)) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6))) 4) 0)))) is different from false [2022-03-17 18:27:12,197 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 5 c_main_~y~0))) (or (< (+ 6 c_main_~c~0) c_main_~k~0) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 11)) (not (= (mod (+ (* .cse0 .cse0 .cse0 (- 6)) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ 5 c_main_~c~0)))) is different from false [2022-03-17 18:27:20,252 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 6 c_main_~y~0))) (or (= (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 13) (+ c_main_~k~0 (* .cse0 c_main_~k~0))) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 13) .cse0 .cse0)) 4) 0)) (< (+ 7 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ 6 c_main_~c~0)))) is different from false [2022-03-17 18:28:14,788 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 8 c_main_~y~0))) (or (not (= (mod (+ (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 1) .cse0 .cse0 .cse0 .cse0)) 4) 0)) (< (+ 9 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ c_main_~c~0 8)) (= (+ (* 2 c_main_~y~0) 17 (* .cse0 .cse0)) (+ (* .cse0 c_main_~k~0) c_main_~k~0)))) is different from false [2022-03-17 18:30:09,205 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 12 c_main_~y~0))) (or (< (+ c_main_~c~0 13) c_main_~k~0) (= (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 25) (+ (* .cse0 c_main_~k~0) c_main_~k~0)) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ c_main_~c~0 12)))) is different from false [2022-03-17 18:31:05,432 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 14 c_main_~y~0))) (or (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 29 (* .cse0 .cse0))) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* .cse0 .cse0 (- 13))) 4) 0)) (< (+ c_main_~c~0 15) c_main_~k~0) (<= c_main_~k~0 (+ 14 c_main_~c~0)))) is different from false [2022-03-17 18:31:13,483 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 15 c_main_~y~0))) (or (<= c_main_~k~0 (+ c_main_~c~0 15)) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 13) .cse0 .cse0)) 4) 0)) (< (+ 16 c_main_~c~0) c_main_~k~0) (= (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 31) (+ (* .cse0 c_main_~k~0) c_main_~k~0)))) is different from false [2022-03-17 18:31:21,535 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 16 c_main_~y~0))) (or (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6))) 4) 0)) (= (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 33) (+ (* .cse0 c_main_~k~0) c_main_~k~0)) (<= c_main_~k~0 (+ 16 c_main_~c~0)) (< (+ c_main_~c~0 17) c_main_~k~0))) is different from false [2022-03-17 18:33:13,781 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 20 c_main_~y~0))) (or (< (+ 21 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ c_main_~c~0 20)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* .cse0 .cse0) 41 (* 2 c_main_~y~0))) (not (= 0 (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6))) 4))))) is different from false