/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:00:12,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:00:12,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:00:12,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 22:00:12,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:00:12,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:00:12,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:00:12,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:00:12,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:00:12,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:00:12,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:00:12,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:00:12,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:00:12,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:00:12,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:00:12,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:00:12,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 22:00:12,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:00:12,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:00:12,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:00:12,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:00:12,658 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:00:12,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:00:12,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:00:12,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:00:12,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:00:12,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:00:12,661 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:00:12,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:00:12,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:00:12,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:00:12,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:00:12,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:00:12,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:00:12,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:00:12,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:00:12,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:00:12,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:00:12,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:00:12,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:00:12,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:00:12,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:00:12,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:00:12,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:00:12,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:00:12,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:00:12,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:00:12,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:00:12,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:00:12,664 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:00:12,664 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:00:12,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:00:12,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:00:12,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:00:12,873 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:00:12,874 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:00:12,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2022-02-23 22:00:12,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbad6f7cd/45afc18ebcc044b7bcfa568863f311ff/FLAG46b6075c6 [2022-02-23 22:00:13,278 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:00:13,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2022-02-23 22:00:13,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbad6f7cd/45afc18ebcc044b7bcfa568863f311ff/FLAG46b6075c6 [2022-02-23 22:00:13,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbad6f7cd/45afc18ebcc044b7bcfa568863f311ff [2022-02-23 22:00:13,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:00:13,296 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:00:13,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:00:13,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:00:13,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:00:13,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b9f15a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13, skipping insertion in model container [2022-02-23 22:00:13,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:00:13,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:00:13,485 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c[525,538] [2022-02-23 22:00:13,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:00:13,530 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:00:13,540 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c[525,538] [2022-02-23 22:00:13,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:00:13,578 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:00:13,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13 WrapperNode [2022-02-23 22:00:13,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:00:13,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:00:13,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:00:13,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:00:13,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:00:13,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:00:13,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:00:13,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:00:13,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:00:13,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:13,648 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) [2022-02-23 22:00:13,671 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 [2022-02-23 22:00:13,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:00:13,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:00:13,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:00:13,685 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:00:13,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:00:13,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:00:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:00:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:00:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:00:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:00:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 22:00:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:00:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:00:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:00:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:00:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:00:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:00:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:00:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:00:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:00:13,732 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:00:13,734 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:00:13,854 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:00:13,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:00:13,858 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 22:00:13,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:00:13 BoogieIcfgContainer [2022-02-23 22:00:13,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:00:13,860 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:00:13,860 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:00:13,867 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:00:13,869 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:00:13" (1/1) ... [2022-02-23 22:00:13,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:00:13 BasicIcfg [2022-02-23 22:00:13,901 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:00:13,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:00:13,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:00:13,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:00:13,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:00:13" (1/4) ... [2022-02-23 22:00:13,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bc80da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:00:13, skipping insertion in model container [2022-02-23 22:00:13,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:13" (2/4) ... [2022-02-23 22:00:13,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bc80da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:00:13, skipping insertion in model container [2022-02-23 22:00:13,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:00:13" (3/4) ... [2022-02-23 22:00:13,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bc80da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:00:13, skipping insertion in model container [2022-02-23 22:00:13,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:00:13" (4/4) ... [2022-02-23 22:00:13,908 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.cqvasr [2022-02-23 22:00:13,911 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:00:13,911 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:00:13,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:00:13,958 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:00:13,959 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:00:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 22:00:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 22:00:13,984 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:13,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:13,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-02-23 22:00:13,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:13,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420620961] [2022-02-23 22:00:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:13,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:14,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:00:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:14,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:00:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:14,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 22:00:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:00:14,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:14,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420620961] [2022-02-23 22:00:14,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420620961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:14,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:14,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:00:14,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783740838] [2022-02-23 22:00:14,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:14,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:00:14,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:00:14,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:00:14,210 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:00:16,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:18,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:18,583 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-02-23 22:00:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:00:18,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 22:00:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:18,589 INFO L225 Difference]: With dead ends: 69 [2022-02-23 22:00:18,589 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 22:00:18,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:00:18,593 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:18,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 9 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-02-23 22:00:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 22:00:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-23 22:00:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 22:00:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-02-23 22:00:18,621 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-02-23 22:00:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:18,621 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-02-23 22:00:18,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:00:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-02-23 22:00:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 22:00:18,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:18,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:18,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:00:18,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-02-23 22:00:18,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:18,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823759948] [2022-02-23 22:00:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:18,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:00:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:18,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:00:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:18,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 22:00:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:00:18,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:18,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823759948] [2022-02-23 22:00:18,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823759948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:18,832 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:18,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 22:00:18,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525039541] [2022-02-23 22:00:18,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:18,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:00:18,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:00:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:00:18,834 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:00:22,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:00:24,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:00:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:26,052 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-02-23 22:00:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 22:00:26,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-02-23 22:00:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:26,054 INFO L225 Difference]: With dead ends: 68 [2022-02-23 22:00:26,054 INFO L226 Difference]: Without dead ends: 48 [2022-02-23 22:00:26,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:00:26,055 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 52 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:26,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 53 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 198 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-02-23 22:00:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-23 22:00:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-23 22:00:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:00:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-02-23 22:00:26,065 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-02-23 22:00:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:26,066 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-02-23 22:00:26,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:00:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-02-23 22:00:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 22:00:26,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:26,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:26,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 22:00:26,067 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:26,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:26,067 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-02-23 22:00:26,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:26,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128790824] [2022-02-23 22:00:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:26,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:26,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:00:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:26,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:00:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:26,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 22:00:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:00:26,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:26,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128790824] [2022-02-23 22:00:26,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128790824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:00:26,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596687848] [2022-02-23 22:00:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:26,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:26,286 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) [2022-02-23 22:00:26,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:00:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:26,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 22:00:26,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 22:00:26,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:00:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 22:00:26,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596687848] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:00:26,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 22:00:26,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-23 22:00:26,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486072236] [2022-02-23 22:00:26,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 22:00:26,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 22:00:26,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:26,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 22:00:26,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-23 22:00:26,749 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-23 22:00:32,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:36,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:38,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:42,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:45,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:00:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:45,533 INFO L93 Difference]: Finished difference Result 82 states and 116 transitions. [2022-02-23 22:00:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 22:00:45,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 26 [2022-02-23 22:00:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:45,535 INFO L225 Difference]: With dead ends: 82 [2022-02-23 22:00:45,535 INFO L226 Difference]: Without dead ends: 62 [2022-02-23 22:00:45,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-02-23 22:00:45,536 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 138 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:45,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 93 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 483 Invalid, 4 Unknown, 0 Unchecked, 18.6s Time] [2022-02-23 22:00:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-23 22:00:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-02-23 22:00:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 22:00:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2022-02-23 22:00:45,546 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 26 [2022-02-23 22:00:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:45,546 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2022-02-23 22:00:45,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-23 22:00:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2022-02-23 22:00:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 22:00:45,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:45,547 INFO L514 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, 1, 1, 1, 1] [2022-02-23 22:00:45,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 22:00:45,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:45,748 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-02-23 22:00:45,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:45,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814695771] [2022-02-23 22:00:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:45,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:45,757 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:45,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783105672] [2022-02-23 22:00:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:45,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:45,759 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) [2022-02-23 22:00:45,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:00:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:45,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:00:45,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 22:00:45,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:00:45,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:45,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814695771] [2022-02-23 22:00:45,935 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:45,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783105672] [2022-02-23 22:00:45,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783105672] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:45,936 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:45,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:00:45,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462432963] [2022-02-23 22:00:45,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:45,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:00:45,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:00:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:00:45,937 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:00:46,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:46,483 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2022-02-23 22:00:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:00:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-02-23 22:00:46,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:46,487 INFO L225 Difference]: With dead ends: 70 [2022-02-23 22:00:46,487 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 22:00:46,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:00:46,488 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:46,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 22:00:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 22:00:46,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-23 22:00:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:00:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-02-23 22:00:46,497 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 34 [2022-02-23 22:00:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:46,497 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-02-23 22:00:46,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:00:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-02-23 22:00:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 22:00:46,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:46,498 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:46,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-23 22:00:46,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-23 22:00:46,702 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-02-23 22:00:46,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:46,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207827153] [2022-02-23 22:00:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:46,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:46,709 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:46,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401583003] [2022-02-23 22:00:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:46,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:46,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:46,723 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) [2022-02-23 22:00:46,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 22:00:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:46,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:00:46,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-23 22:00:46,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:00:46,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:46,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207827153] [2022-02-23 22:00:46,875 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:46,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401583003] [2022-02-23 22:00:46,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401583003] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:46,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:46,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:00:46,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769915086] [2022-02-23 22:00:46,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:46,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:00:46,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:46,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:00:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:00:46,876 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:00:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:48,073 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-02-23 22:00:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:00:48,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-23 22:00:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:48,074 INFO L225 Difference]: With dead ends: 57 [2022-02-23 22:00:48,074 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 22:00:48,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:00:48,076 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 5 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:48,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 166 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 22:00:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 22:00:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-23 22:00:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:00:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-23 22:00:48,081 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 36 [2022-02-23 22:00:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:48,081 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-23 22:00:48,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:00:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-23 22:00:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-23 22:00:48,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:48,083 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:48,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-23 22:00:48,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:48,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:48,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-02-23 22:00:48,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:48,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583335406] [2022-02-23 22:00:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:48,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:48,295 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:48,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430220803] [2022-02-23 22:00:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:48,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:48,296 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) [2022-02-23 22:00:48,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 22:00:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:48,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-23 22:00:48,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-02-23 22:00:48,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:00:53,283 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~q~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 3 .cse0) (* 2 (div (mod c_main_~p~0 4294967296) 2))) 4294967296))) (= .cse1 1))) is different from false [2022-02-23 22:01:57,061 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~q~0 4) 4294967296)) (.cse2 (mod c_main_~n~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 2 (div (mod c_main_~p~0 4294967296) 2)) (* 3 .cse0)) 4294967296))) (<= .cse1 .cse2) (= 1 .cse1) (not (<= (mod c_main_~q~0 4294967296) .cse2)))) is different from true [2022-02-23 22:02:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 4 not checked. [2022-02-23 22:02:11,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:02:11,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583335406] [2022-02-23 22:02:11,880 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:02:11,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430220803] [2022-02-23 22:02:11,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430220803] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:02:11,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:02:11,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-02-23 22:02:11,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068300797] [2022-02-23 22:02:11,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:02:11,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 22:02:11,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:02:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 22:02:11,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=164, Unknown=11, NotChecked=54, Total=272 [2022-02-23 22:02:11,882 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-02-23 22:02:13,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:18,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:21,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:24,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:27,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:29,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:31,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:33,980 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod c_main_~r~0 4294967296) (mod (+ (* 2 c_main_~p~0) c_main_~q~0) 4294967296)) (let ((.cse1 (mod c_main_~q~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 3 .cse0) (* 2 (div (mod c_main_~p~0 4294967296) 2))) 4294967296))) (<= .cse1 (mod c_main_~n~0 4294967296)) (= .cse1 1)))) is different from false [2022-02-23 22:02:35,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:38,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:02:40,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:42,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:02:42,449 INFO L93 Difference]: Finished difference Result 89 states and 120 transitions. [2022-02-23 22:02:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 22:02:42,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 59 [2022-02-23 22:02:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:02:42,580 INFO L225 Difference]: With dead ends: 89 [2022-02-23 22:02:42,580 INFO L226 Difference]: Without dead ends: 71 [2022-02-23 22:02:42,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=67, Invalid=274, Unknown=13, NotChecked=108, Total=462 [2022-02-23 22:02:42,581 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 46 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:02:42,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 382 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 174 Invalid, 11 Unknown, 91 Unchecked, 26.2s Time] [2022-02-23 22:02:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-23 22:02:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2022-02-23 22:02:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.088235294117647) internal successors, (37), 36 states have internal predecessors, (37), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 22:02:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-02-23 22:02:42,588 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 59 [2022-02-23 22:02:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:02:42,588 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-02-23 22:02:42,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-02-23 22:02:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-02-23 22:02:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-23 22:02:42,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:02:42,589 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:02:42,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 22:02:42,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:42,794 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:02:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:02:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1266975567, now seen corresponding path program 2 times [2022-02-23 22:02:42,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:02:42,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444479128] [2022-02-23 22:02:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:02:42,806 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:02:42,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740017589] [2022-02-23 22:02:42,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:02:42,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:42,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:02:42,807 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) [2022-02-23 22:02:42,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process