/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/hard-u_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 00:15:47,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 00:15:47,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 00:15:47,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 00:15:47,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 00:15:47,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 00:15:47,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 00:15:47,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 00:15:47,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 00:15:47,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 00:15:47,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 00:15:47,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 00:15:47,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 00:15:47,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 00:15:47,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 00:15:47,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 00:15:47,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 00:15:47,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 00:15:47,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 00:15:47,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 00:15:47,745 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 00:15:47,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 00:15:47,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 00:15:47,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 00:15:47,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 00:15:47,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 00:15:47,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 00:15:47,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 00:15:47,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 00:15:47,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-19 00:15:47,806 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 00:15:47,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 00:15:47,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 00:15:47,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 00:15:47,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 00:15:47,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 00:15:47,810 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 00:15:47,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 00:15:47,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 00:15:47,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 00:15:47,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 00:15:47,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 00:15:47,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 00:15:47,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 00:15:47,811 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 00:15:47,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 00:15:47,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 00:15:47,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 00:15:47,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 00:15:47,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 00:15:47,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 00:15:47,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 00:15:47,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 00:15:47,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 00:15:47,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 00:15:47,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 00:15:47,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-19 00:15:47,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-19 00:15:47,814 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-19 00:15:47,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 00:15:48,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 00:15:48,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 00:15:48,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 00:15:48,095 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 00:15:48,096 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 00:15:48,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2022-03-19 00:15:48,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556a3321c/3bf856db921e4c7080de217a171c4b27/FLAG08779646e [2022-03-19 00:15:48,630 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 00:15:48,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2022-03-19 00:15:48,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556a3321c/3bf856db921e4c7080de217a171c4b27/FLAG08779646e [2022-03-19 00:15:49,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556a3321c/3bf856db921e4c7080de217a171c4b27 [2022-03-19 00:15:49,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 00:15:49,144 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-19 00:15:49,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 00:15:49,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 00:15:49,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 00:15:49,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c6a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49, skipping insertion in model container [2022-03-19 00:15:49,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 00:15:49,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 00:15:49,297 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/hard-u_unwindbound100.c[537,550] [2022-03-19 00:15:49,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 00:15:49,346 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 00:15:49,359 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/hard-u_unwindbound100.c[537,550] [2022-03-19 00:15:49,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 00:15:49,394 INFO L208 MainTranslator]: Completed translation [2022-03-19 00:15:49,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49 WrapperNode [2022-03-19 00:15:49,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 00:15:49,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 00:15:49,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 00:15:49,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 00:15:49,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 00:15:49,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 00:15:49,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 00:15:49,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 00:15:49,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 00:15:49,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:15:49,442 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) [2022-03-19 00:15:49,444 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 [2022-03-19 00:15:49,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 00:15:49,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 00:15:49,473 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 00:15:49,474 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 00:15:49,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 00:15:49,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 00:15:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 00:15:49,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 00:15:49,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 00:15:49,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 00:15:49,516 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 00:15:49,517 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 00:15:49,607 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 00:15:49,610 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 00:15:49,610 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 00:15:49,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:15:49 BoogieIcfgContainer [2022-03-19 00:15:49,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 00:15:49,612 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-19 00:15:49,612 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-19 00:15:49,613 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-19 00:15:49,615 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:15:49" (1/1) ... [2022-03-19 00:15:49,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 12:15:49 BasicIcfg [2022-03-19 00:15:49,629 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-19 00:15:49,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 00:15:49,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 00:15:49,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 00:15:49,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 12:15:49" (1/4) ... [2022-03-19 00:15:49,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d51fb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:15:49, skipping insertion in model container [2022-03-19 00:15:49,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:15:49" (2/4) ... [2022-03-19 00:15:49,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d51fb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:15:49, skipping insertion in model container [2022-03-19 00:15:49,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:15:49" (3/4) ... [2022-03-19 00:15:49,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d51fb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 12:15:49, skipping insertion in model container [2022-03-19 00:15:49,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 12:15:49" (4/4) ... [2022-03-19 00:15:49,633 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound100.cqvasr [2022-03-19 00:15:49,636 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 00:15:49,636 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 00:15:49,664 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 00:15:49,668 INFO L340 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 [2022-03-19 00:15:49,668 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 00:15:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 00:15:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 00:15:49,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:15:49,681 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:15:49,682 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:15:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:15:49,684 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-03-19 00:15:49,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:15:49,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624131251] [2022-03-19 00:15:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:49,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:15:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:49,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 00:15:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:49,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 00:15:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:15:49,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:15:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624131251] [2022-03-19 00:15:49,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624131251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:15:49,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:15:49,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 00:15:49,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161589822] [2022-03-19 00:15:49,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:15:49,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 00:15:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:15:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 00:15:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 00:15:49,834 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 00:15:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:15:49,902 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-19 00:15:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 00:15:49,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-19 00:15:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:15:49,909 INFO L225 Difference]: With dead ends: 66 [2022-03-19 00:15:49,909 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 00:15:49,911 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 [2022-03-19 00:15:49,924 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:15:49,925 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:15:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 00:15:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-19 00:15:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 00:15:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-19 00:15:50,019 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-19 00:15:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:15:50,020 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-19 00:15:50,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 00:15:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-19 00:15:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 00:15:50,022 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:15:50,022 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:15:50,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 00:15:50,023 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:15:50,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:15:50,026 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-03-19 00:15:50,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:15:50,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639635768] [2022-03-19 00:15:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:50,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:15:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:50,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 00:15:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:50,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 00:15:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:15:50,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:15:50,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639635768] [2022-03-19 00:15:50,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639635768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:15:50,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:15:50,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 00:15:50,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434070158] [2022-03-19 00:15:50,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:15:50,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 00:15:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:15:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 00:15:50,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:15:50,220 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 00:15:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:15:50,414 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-19 00:15:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 00:15:50,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-19 00:15:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:15:50,415 INFO L225 Difference]: With dead ends: 47 [2022-03-19 00:15:50,416 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 00:15:50,416 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:15:50,417 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:15:50,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:15:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 00:15:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-19 00:15:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 00:15:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-19 00:15:50,427 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-19 00:15:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:15:50,428 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-19 00:15:50,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 00:15:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-19 00:15:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 00:15:50,429 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:15:50,429 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:15:50,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 00:15:50,429 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:15:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:15:50,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-03-19 00:15:50,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:15:50,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661839622] [2022-03-19 00:15:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:15:50,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:15:50,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84566540] [2022-03-19 00:15:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:50,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:50,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:15:50,472 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) [2022-03-19 00:15:50,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 00:15:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:50,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 00:15:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:15:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:15:50,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:15:50,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:15:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661839622] [2022-03-19 00:15:50,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:15:50,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84566540] [2022-03-19 00:15:50,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84566540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:15:50,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:15:50,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 00:15:50,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270327947] [2022-03-19 00:15:50,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:15:50,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 00:15:50,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:15:50,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 00:15:50,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 00:15:50,616 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 00:15:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:15:50,640 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-03-19 00:15:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 00:15:50,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 00:15:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:15:50,644 INFO L225 Difference]: With dead ends: 52 [2022-03-19 00:15:50,644 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 00:15:50,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 00:15:50,645 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:15:50,646 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:15:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 00:15:50,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 00:15:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 00:15:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-19 00:15:50,653 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-19 00:15:50,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:15:50,654 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-19 00:15:50,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 00:15:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-19 00:15:50,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 00:15:50,654 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:15:50,655 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:15:50,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 00:15:50,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:50,880 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:15:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:15:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-03-19 00:15:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:15:50,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339254020] [2022-03-19 00:15:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:50,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:15:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:50,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 00:15:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:50,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 00:15:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:50,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 00:15:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:15:51,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:15:51,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339254020] [2022-03-19 00:15:51,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339254020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:15:51,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:15:51,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 00:15:51,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462560614] [2022-03-19 00:15:51,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:15:51,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 00:15:51,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:15:51,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 00:15:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:15:51,005 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 00:15:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:15:51,140 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-19 00:15:51,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 00:15:51,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 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 23 [2022-03-19 00:15:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:15:51,142 INFO L225 Difference]: With dead ends: 52 [2022-03-19 00:15:51,142 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 00:15:51,143 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:15:51,144 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:15:51,144 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:15:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 00:15:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-19 00:15:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 00:15:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-19 00:15:51,152 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-19 00:15:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:15:51,153 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-19 00:15:51,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 00:15:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-19 00:15:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 00:15:51,154 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:15:51,154 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:15:51,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 00:15:51,154 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:15:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:15:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-03-19 00:15:51,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:15:51,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050239392] [2022-03-19 00:15:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:15:51,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:15:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603032003] [2022-03-19 00:15:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:51,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:51,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:15:51,188 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) [2022-03-19 00:15:51,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 00:15:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:51,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 00:15:51,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:15:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:15:51,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:15:51,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:15:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050239392] [2022-03-19 00:15:51,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:15:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603032003] [2022-03-19 00:15:51,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603032003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:15:51,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:15:51,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 00:15:51,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262715053] [2022-03-19 00:15:51,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:15:51,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:15:51,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:15:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:15:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:15:51,315 INFO L87 Difference]: Start difference. First operand 42 states and 50 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 00:15:53,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 00:15:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:15:53,472 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-03-19 00:15:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:15:53,473 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 00:15:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:15:53,473 INFO L225 Difference]: With dead ends: 59 [2022-03-19 00:15:53,474 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 00:15:53,474 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:15:53,475 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:15:53,475 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 00:15:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 00:15:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-19 00:15:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 00:15:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-03-19 00:15:53,483 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-03-19 00:15:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:15:53,484 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-03-19 00:15:53,484 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 00:15:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-03-19 00:15:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 00:15:53,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:15:53,485 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2022-03-19 00:15:53,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 00:15:53,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:53,709 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:15:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:15:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-03-19 00:15:53,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:15:53,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979711528] [2022-03-19 00:15:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:53,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:15:53,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:15:53,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172615077] [2022-03-19 00:15:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:53,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:53,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:15:53,756 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) [2022-03-19 00:15:53,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 00:15:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:53,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 00:15:53,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:15:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 00:15:54,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:15:54,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:15:54,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979711528] [2022-03-19 00:15:54,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:15:54,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172615077] [2022-03-19 00:15:54,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172615077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:15:54,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:15:54,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 00:15:54,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875326578] [2022-03-19 00:15:54,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:15:54,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:15:54,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:15:54,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:15:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:15:54,081 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 00:15:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:15:54,137 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-03-19 00:15:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:15:54,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-19 00:15:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:15:54,138 INFO L225 Difference]: With dead ends: 76 [2022-03-19 00:15:54,138 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 00:15:54,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:15:54,139 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:15:54,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:15:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 00:15:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-19 00:15:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 00:15:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-03-19 00:15:54,148 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-03-19 00:15:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:15:54,148 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-03-19 00:15:54,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 00:15:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-03-19 00:15:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 00:15:54,149 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:15:54,149 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2022-03-19 00:15:54,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 00:15:54,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:54,372 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:15:54,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:15:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-03-19 00:15:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:15:54,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956873436] [2022-03-19 00:15:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:54,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:15:54,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:15:54,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52168036] [2022-03-19 00:15:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:54,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:54,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:15:54,402 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) [2022-03-19 00:15:54,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 00:15:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 00:15:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:15:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 00:15:54,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:15:54,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:15:54,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956873436] [2022-03-19 00:15:54,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:15:54,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52168036] [2022-03-19 00:15:54,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52168036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:15:54,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:15:54,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 00:15:54,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397331339] [2022-03-19 00:15:54,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:15:54,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 00:15:54,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:15:54,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 00:15:54,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:15:54,643 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-03-19 00:15:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:15:54,860 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-03-19 00:15:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 00:15:54,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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 [2022-03-19 00:15:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:15:54,862 INFO L225 Difference]: With dead ends: 82 [2022-03-19 00:15:54,862 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 00:15:54,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 00:15:54,863 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 00:15:54,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 00:15:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 00:15:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-19 00:15:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 00:15:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-03-19 00:15:54,875 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-03-19 00:15:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:15:54,875 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-03-19 00:15:54,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-03-19 00:15:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-03-19 00:15:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 00:15:54,882 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:15:54,882 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2022-03-19 00:15:54,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-19 00:15:55,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:55,108 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:15:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:15:55,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-03-19 00:15:55,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:15:55,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671088384] [2022-03-19 00:15:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:55,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:15:55,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:15:55,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31863905] [2022-03-19 00:15:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:55,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:55,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:15:55,148 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) [2022-03-19 00:15:55,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 00:15:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:55,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 00:15:55,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:15:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 00:15:55,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:15:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 00:15:55,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:15:55,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671088384] [2022-03-19 00:15:55,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:15:55,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31863905] [2022-03-19 00:15:55,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31863905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:15:55,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:15:55,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 00:15:55,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486803447] [2022-03-19 00:15:55,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:15:55,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 00:15:55,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:15:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 00:15:55,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 00:15:55,577 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-19 00:15:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:15:55,831 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-03-19 00:15:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 00:15:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-03-19 00:15:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:15:55,834 INFO L225 Difference]: With dead ends: 160 [2022-03-19 00:15:55,834 INFO L226 Difference]: Without dead ends: 146 [2022-03-19 00:15:55,835 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-19 00:15:55,835 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 00:15:55,836 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 224 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 00:15:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-19 00:15:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-03-19 00:15:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-19 00:15:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-03-19 00:15:55,869 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-03-19 00:15:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:15:55,870 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-03-19 00:15:55,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-19 00:15:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-03-19 00:15:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 00:15:55,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:15:55,871 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:15:55,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 00:15:56,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:56,092 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:15:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:15:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-03-19 00:15:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:15:56,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507943410] [2022-03-19 00:15:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:56,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:15:56,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:15:56,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841341439] [2022-03-19 00:15:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:15:56,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:15:56,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:15:56,124 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) [2022-03-19 00:15:56,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 00:15:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:15:56,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 00:15:56,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:15:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 00:15:56,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:15:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 00:15:56,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:15:56,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507943410] [2022-03-19 00:15:56,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:15:56,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841341439] [2022-03-19 00:15:56,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841341439] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 00:15:56,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 00:15:56,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-19 00:15:56,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315780981] [2022-03-19 00:15:56,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:15:56,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 00:15:56,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:15:56,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 00:15:56,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 00:15:56,693 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 00:15:58,740 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:16:00,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:16:02,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:16:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:03,014 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-03-19 00:16:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:16:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-03-19 00:16:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:03,016 INFO L225 Difference]: With dead ends: 162 [2022-03-19 00:16:03,016 INFO L226 Difference]: Without dead ends: 160 [2022-03-19 00:16:03,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 00:16:03,016 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:03,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2022-03-19 00:16:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-19 00:16:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-03-19 00:16:03,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 00:16:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-03-19 00:16:03,029 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-03-19 00:16:03,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:03,029 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-03-19 00:16:03,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 00:16:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-03-19 00:16:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 00:16:03,030 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:03,030 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1, 1] [2022-03-19 00:16:03,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 00:16:03,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:03,231 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:03,232 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-03-19 00:16:03,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:03,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340679589] [2022-03-19 00:16:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:03,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:16:03,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859726133] [2022-03-19 00:16:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:03,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:03,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:16:03,241 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) [2022-03-19 00:16:03,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 00:16:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:03,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 00:16:03,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:16:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 00:16:03,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:16:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 00:16:03,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:16:03,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340679589] [2022-03-19 00:16:03,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:16:03,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859726133] [2022-03-19 00:16:03,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859726133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:16:03,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:16:03,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 00:16:03,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561933606] [2022-03-19 00:16:03,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:16:03,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 00:16:03,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:16:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 00:16:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:16:03,501 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 00:16:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:03,667 INFO L93 Difference]: Finished difference Result 281 states and 346 transitions. [2022-03-19 00:16:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 00:16:03,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-03-19 00:16:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:03,669 INFO L225 Difference]: With dead ends: 281 [2022-03-19 00:16:03,669 INFO L226 Difference]: Without dead ends: 257 [2022-03-19 00:16:03,670 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-19 00:16:03,670 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 96 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:03,670 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 330 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:16:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-19 00:16:03,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-03-19 00:16:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 160 states have (on average 1.2) internal successors, (192), 172 states have internal predecessors, (192), 59 states have call successors, (59), 31 states have call predecessors, (59), 30 states have return successors, (54), 46 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-19 00:16:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 305 transitions. [2022-03-19 00:16:03,707 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 305 transitions. Word has length 50 [2022-03-19 00:16:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:03,707 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 305 transitions. [2022-03-19 00:16:03,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 00:16:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 305 transitions. [2022-03-19 00:16:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 00:16:03,708 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:03,708 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-03-19 00:16:03,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 00:16:03,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:03,925 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:03,925 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-03-19 00:16:03,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:03,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072250803] [2022-03-19 00:16:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:03,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:03,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:16:03,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958823862] [2022-03-19 00:16:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:03,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:03,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:16:03,934 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) [2022-03-19 00:16:03,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process