/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 16:21:45,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 16:21:45,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 16:21:45,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 16:21:45,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 16:21:45,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 16:21:45,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 16:21:45,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 16:21:45,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 16:21:45,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 16:21:45,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 16:21:45,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 16:21:45,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 16:21:45,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 16:21:45,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 16:21:45,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 16:21:45,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 16:21:45,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 16:21:45,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 16:21:45,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 16:21:45,763 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 16:21:45,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 16:21:45,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 16:21:45,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 16:21:45,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 16:21:45,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 16:21:45,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 16:21:45,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 16:21:45,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 16:21:45,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 16:21:45,792 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 16:21:45,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 16:21:45,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 16:21:45,794 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 16:21:45,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 16:21:45,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 16:21:45,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 16:21:45,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 16:21:45,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 16:21:45,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 16:21:45,801 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 16:21:45,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 16:21:45,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 16:21:45,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 16:21:45,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 16:21:45,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 16:21:45,802 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 16:21:45,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 16:21:45,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 16:21:45,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 16:21:45,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 16:21:45,803 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 16:21:45,804 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 16:21:46,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 16:21:46,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 16:21:46,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 16:21:46,079 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 16:21:46,080 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 16:21:46,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i [2022-03-17 16:21:46,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1069fe1f/e93b75827bbb432db629ab6fce94698d/FLAGa0d74ad07 [2022-03-17 16:21:46,599 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 16:21:46,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i [2022-03-17 16:21:46,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1069fe1f/e93b75827bbb432db629ab6fce94698d/FLAGa0d74ad07 [2022-03-17 16:21:46,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1069fe1f/e93b75827bbb432db629ab6fce94698d [2022-03-17 16:21:46,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 16:21:46,999 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 16:21:47,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 16:21:47,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 16:21:47,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 16:21:47,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 04:21:46" (1/1) ... [2022-03-17 16:21:47,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c281a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47, skipping insertion in model container [2022-03-17 16:21:47,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 04:21:46" (1/1) ... [2022-03-17 16:21:47,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 16:21:47,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 16:21:47,147 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2022-03-17 16:21:47,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 16:21:47,193 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 16:21:47,202 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2022-03-17 16:21:47,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 16:21:47,218 INFO L208 MainTranslator]: Completed translation [2022-03-17 16:21:47,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47 WrapperNode [2022-03-17 16:21:47,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 16:21:47,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 16:21:47,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 16:21:47,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 16:21:47,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47" (1/1) ... [2022-03-17 16:21:47,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47" (1/1) ... [2022-03-17 16:21:47,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47" (1/1) ... [2022-03-17 16:21:47,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47" (1/1) ... [2022-03-17 16:21:47,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47" (1/1) ... [2022-03-17 16:21:47,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47" (1/1) ... [2022-03-17 16:21:47,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47" (1/1) ... [2022-03-17 16:21:47,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 16:21:47,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 16:21:47,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 16:21:47,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 16:21:47,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47" (1/1) ... [2022-03-17 16:21:47,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 16:21:47,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:21:47,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 16:21:47,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 16:21:47,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 16:21:47,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 16:21:47,350 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 16:21:47,350 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 16:21:47,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 16:21:47,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 16:21:47,351 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 16:21:47,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 16:21:47,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 16:21:47,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 16:21:47,351 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 16:21:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 16:21:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 16:21:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 16:21:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 16:21:47,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 16:21:47,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 16:21:47,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 16:21:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 16:21:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 16:21:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 16:21:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 16:21:47,447 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 16:21:47,449 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 16:21:47,620 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 16:21:47,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 16:21:47,625 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 16:21:47,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:21:47 BoogieIcfgContainer [2022-03-17 16:21:47,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 16:21:47,628 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 16:21:47,628 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 16:21:47,644 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 16:21:47,647 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:21:47" (1/1) ... [2022-03-17 16:21:47,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 04:21:47 BasicIcfg [2022-03-17 16:21:47,678 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 16:21:47,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 16:21:47,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 16:21:47,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 16:21:47,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 04:21:46" (1/4) ... [2022-03-17 16:21:47,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540706e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 04:21:47, skipping insertion in model container [2022-03-17 16:21:47,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:21:47" (2/4) ... [2022-03-17 16:21:47,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540706e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 04:21:47, skipping insertion in model container [2022-03-17 16:21:47,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:21:47" (3/4) ... [2022-03-17 16:21:47,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540706e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 04:21:47, skipping insertion in model container [2022-03-17 16:21:47,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 04:21:47" (4/4) ... [2022-03-17 16:21:47,686 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound10.iJordan [2022-03-17 16:21:47,691 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 16:21:47,691 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 16:21:47,784 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 16:21:47,790 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 16:21:47,790 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 16:21:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 16:21:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 16:21:47,815 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:21:47,816 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:21:47,816 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:21:47,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:21:47,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2022-03-17 16:21:47,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:21:47,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467258118] [2022-03-17 16:21:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:47,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:21:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:47,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 16:21:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:48,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:21:48,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467258118] [2022-03-17 16:21:48,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467258118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:21:48,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:21:48,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 16:21:48,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004088173] [2022-03-17 16:21:48,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:21:48,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 16:21:48,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:21:48,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 16:21:48,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:21:48,042 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:21:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:21:48,131 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-03-17 16:21:48,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 16:21:48,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 16:21:48,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:21:48,144 INFO L225 Difference]: With dead ends: 27 [2022-03-17 16:21:48,144 INFO L226 Difference]: Without dead ends: 22 [2022-03-17 16:21:48,146 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:21:48,150 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:21:48,151 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:21:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-17 16:21:48,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-17 16:21:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 16:21:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-03-17 16:21:48,181 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-03-17 16:21:48,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:21:48,181 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-03-17 16:21:48,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:21:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-03-17 16:21:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 16:21:48,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:21:48,182 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:21:48,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 16:21:48,183 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:21:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:21:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2022-03-17 16:21:48,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:21:48,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270091318] [2022-03-17 16:21:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:48,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:21:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:48,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 16:21:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:48,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:21:48,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270091318] [2022-03-17 16:21:48,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270091318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:21:48,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:21:48,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 16:21:48,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081565150] [2022-03-17 16:21:48,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:21:48,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:21:48,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:21:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:21:48,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:21:48,268 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:21:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:21:48,322 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-03-17 16:21:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 16:21:48,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-17 16:21:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:21:48,324 INFO L225 Difference]: With dead ends: 23 [2022-03-17 16:21:48,324 INFO L226 Difference]: Without dead ends: 23 [2022-03-17 16:21:48,325 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 16:21:48,326 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:21:48,327 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:21:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-17 16:21:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-17 16:21:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 16:21:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-03-17 16:21:48,332 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2022-03-17 16:21:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:21:48,332 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-03-17 16:21:48,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:21:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-03-17 16:21:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-17 16:21:48,333 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:21:48,334 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:21:48,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 16:21:48,334 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:21:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:21:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2022-03-17 16:21:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:21:48,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691007850] [2022-03-17 16:21:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:48,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:21:48,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:21:48,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292000846] [2022-03-17 16:21:48,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:48,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:48,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:21:48,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:21:48,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 16:21:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:48,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 16:21:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:21:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:48,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:21:48,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:21:48,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691007850] [2022-03-17 16:21:48,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:21:48,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292000846] [2022-03-17 16:21:48,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292000846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:21:48,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:21:48,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:21:48,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905593299] [2022-03-17 16:21:48,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:21:48,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:21:48,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:21:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:21:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:21:48,513 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:21:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:21:48,556 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-03-17 16:21:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:21:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-17 16:21:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:21:48,557 INFO L225 Difference]: With dead ends: 27 [2022-03-17 16:21:48,557 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 16:21:48,558 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:21:48,559 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:21:48,559 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:21:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 16:21:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-17 16:21:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 16:21:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-03-17 16:21:48,565 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-03-17 16:21:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:21:48,566 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-03-17 16:21:48,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:21:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-03-17 16:21:48,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-17 16:21:48,566 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:21:48,567 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:21:48,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 16:21:48,767 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 [2022-03-17 16:21:48,769 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:21:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:21:48,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2022-03-17 16:21:48,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:21:48,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825991965] [2022-03-17 16:21:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:48,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:21:48,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:21:48,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659067532] [2022-03-17 16:21:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:48,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:48,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:21:48,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:21:48,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 16:21:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:48,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 16:21:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:21:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:49,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:21:49,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:21:49,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825991965] [2022-03-17 16:21:49,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:21:49,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659067532] [2022-03-17 16:21:49,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659067532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:21:49,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:21:49,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 16:21:49,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338069462] [2022-03-17 16:21:49,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:21:49,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 16:21:49,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:21:49,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 16:21:49,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-17 16:21:49,004 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:21:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:21:49,050 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-03-17 16:21:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 16:21:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-17 16:21:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:21:49,052 INFO L225 Difference]: With dead ends: 33 [2022-03-17 16:21:49,052 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 16:21:49,052 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-17 16:21:49,053 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:21:49,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:21:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 16:21:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-17 16:21:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 16:21:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-17 16:21:49,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2022-03-17 16:21:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:21:49,059 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-17 16:21:49,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:21:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-17 16:21:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 16:21:49,060 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:21:49,060 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:21:49,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 16:21:49,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 16:21:49,284 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:21:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:21:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2022-03-17 16:21:49,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:21:49,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871323089] [2022-03-17 16:21:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:49,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:21:49,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:21:49,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347046424] [2022-03-17 16:21:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:49,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:49,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:21:49,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:21:49,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 16:21:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:49,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 16:21:49,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:21:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:49,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:21:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:49,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:21:49,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871323089] [2022-03-17 16:21:49,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:21:49,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347046424] [2022-03-17 16:21:49,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347046424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:21:49,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:21:49,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 16:21:49,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944480141] [2022-03-17 16:21:49,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:21:49,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 16:21:49,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:21:49,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 16:21:49,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:21:49,502 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 16:21:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:21:49,574 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-17 16:21:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 16:21:49,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 16:21:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:21:49,578 INFO L225 Difference]: With dead ends: 54 [2022-03-17 16:21:49,578 INFO L226 Difference]: Without dead ends: 54 [2022-03-17 16:21:49,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:21:49,581 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:21:49,582 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 94 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:21:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-17 16:21:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2022-03-17 16:21:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 16:21:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-03-17 16:21:49,597 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 17 [2022-03-17 16:21:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:21:49,597 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-03-17 16:21:49,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 16:21:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-03-17 16:21:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 16:21:49,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:21:49,599 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:21:49,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 16:21:49,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:49,811 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:21:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:21:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2022-03-17 16:21:49,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:21:49,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699307815] [2022-03-17 16:21:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:49,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:21:49,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:21:49,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592989676] [2022-03-17 16:21:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:49,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:49,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:21:49,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:21:49,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 16:21:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:49,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 16:21:49,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:21:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:49,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:21:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:50,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:21:50,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699307815] [2022-03-17 16:21:50,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:21:50,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592989676] [2022-03-17 16:21:50,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592989676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:21:50,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:21:50,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-17 16:21:50,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249690927] [2022-03-17 16:21:50,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:21:50,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 16:21:50,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:21:50,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 16:21:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 16:21:50,033 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 16:21:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:21:50,135 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2022-03-17 16:21:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 16:21:50,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-17 16:21:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:21:50,137 INFO L225 Difference]: With dead ends: 84 [2022-03-17 16:21:50,137 INFO L226 Difference]: Without dead ends: 84 [2022-03-17 16:21:50,137 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-17 16:21:50,138 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 79 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:21:50,138 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 136 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:21:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-17 16:21:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2022-03-17 16:21:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 63 states have internal predecessors, (81), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 16:21:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2022-03-17 16:21:50,145 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 18 [2022-03-17 16:21:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:21:50,145 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2022-03-17 16:21:50,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 16:21:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2022-03-17 16:21:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 16:21:50,146 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:21:50,146 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:21:50,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 16:21:50,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:50,361 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:21:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:21:50,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2052329254, now seen corresponding path program 1 times [2022-03-17 16:21:50,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:21:50,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409395724] [2022-03-17 16:21:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:50,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:21:50,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:21:50,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809695690] [2022-03-17 16:21:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:50,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:50,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:21:50,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:21:50,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 16:21:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:50,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 16:21:50,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:21:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:50,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:21:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:50,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:21:50,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409395724] [2022-03-17 16:21:50,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:21:50,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809695690] [2022-03-17 16:21:50,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809695690] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 16:21:50,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 16:21:50,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-17 16:21:50,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502031725] [2022-03-17 16:21:50,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:21:50,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 16:21:50,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:21:50,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 16:21:50,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:21:50,765 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:21:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:21:50,783 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2022-03-17 16:21:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 16:21:50,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-17 16:21:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:21:50,786 INFO L225 Difference]: With dead ends: 108 [2022-03-17 16:21:50,786 INFO L226 Difference]: Without dead ends: 108 [2022-03-17 16:21:50,786 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-17 16:21:50,787 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:21:50,788 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 104 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-03-17 16:21:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-17 16:21:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-03-17 16:21:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 89 states have internal predecessors, (104), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 16:21:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2022-03-17 16:21:50,800 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 18 [2022-03-17 16:21:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:21:50,800 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2022-03-17 16:21:50,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:21:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2022-03-17 16:21:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 16:21:50,801 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:21:50,801 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:21:50,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 16:21:51,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:51,008 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:21:51,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:21:51,008 INFO L85 PathProgramCache]: Analyzing trace with hash 462666167, now seen corresponding path program 1 times [2022-03-17 16:21:51,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:21:51,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389762390] [2022-03-17 16:21:51,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:51,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:21:51,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:21:51,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554871992] [2022-03-17 16:21:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:51,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:51,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:21:51,020 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:21:51,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 16:21:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 16:21:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:21:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:51,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:21:51,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:21:51,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389762390] [2022-03-17 16:21:51,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:21:51,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554871992] [2022-03-17 16:21:51,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554871992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:21:51,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:21:51,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 16:21:51,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004308652] [2022-03-17 16:21:51,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:21:51,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 16:21:51,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:21:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 16:21:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:21:51,143 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 16:21:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:21:51,161 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2022-03-17 16:21:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 16:21:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-17 16:21:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:21:51,163 INFO L225 Difference]: With dead ends: 103 [2022-03-17 16:21:51,163 INFO L226 Difference]: Without dead ends: 93 [2022-03-17 16:21:51,163 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:21:51,164 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:21:51,164 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:21:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-17 16:21:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-17 16:21:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 77 states have internal predecessors, (91), 13 states have call successors, (13), 10 states have call predecessors, (13), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 16:21:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-03-17 16:21:51,172 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 24 [2022-03-17 16:21:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:21:51,173 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-03-17 16:21:51,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 16:21:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-03-17 16:21:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 16:21:51,174 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:21:51,174 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:21:51,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 16:21:51,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:51,392 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:21:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:21:51,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1651364104, now seen corresponding path program 1 times [2022-03-17 16:21:51,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:21:51,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243620010] [2022-03-17 16:21:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:51,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:21:51,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:21:51,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934130417] [2022-03-17 16:21:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:51,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:51,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:21:51,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:21:51,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 16:21:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 16:21:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:21:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-17 16:21:51,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:21:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-17 16:21:51,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:21:51,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243620010] [2022-03-17 16:21:51,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:21:51,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934130417] [2022-03-17 16:21:51,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934130417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:21:51,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:21:51,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-17 16:21:51,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626313129] [2022-03-17 16:21:51,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:21:51,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 16:21:51,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:21:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 16:21:51,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 16:21:51,694 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 16:21:53,701 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 [] [2022-03-17 16:21:55,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 16:21:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:21:55,931 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2022-03-17 16:21:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 16:21:55,932 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-03-17 16:21:55,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:21:55,933 INFO L225 Difference]: With dead ends: 106 [2022-03-17 16:21:55,933 INFO L226 Difference]: Without dead ends: 88 [2022-03-17 16:21:55,933 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:21:55,934 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-17 16:21:55,934 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 92 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-03-17 16:21:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-17 16:21:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-17 16:21:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 16:21:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2022-03-17 16:21:55,941 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 24 [2022-03-17 16:21:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:21:55,941 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2022-03-17 16:21:55,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 16:21:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2022-03-17 16:21:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 16:21:55,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:21:55,943 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:21:55,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 16:21:56,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:56,160 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:21:56,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:21:56,160 INFO L85 PathProgramCache]: Analyzing trace with hash -268589446, now seen corresponding path program 1 times [2022-03-17 16:21:56,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:21:56,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664495853] [2022-03-17 16:21:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:56,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:21:56,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:21:56,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888312629] [2022-03-17 16:21:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:21:56,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:21:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:21:56,173 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:21:56,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 16:21:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:21:56,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 16:21:56,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:21:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:21:56,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:21:58,891 WARN L855 $PredicateComparison]: unable to prove that (= (mod c_main_~A~0 4294967296) (mod (+ (* (div (mod c_main_~b~0 4294967296) 2) (* c_main_~q~0 2)) c_main_~r~0) 4294967296)) is different from true [2022-03-17 16:22:22,375 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~b~0 2) 4294967296)) (.cse0 (mod c_main_~r~0 4294967296))) (or (not (<= (mod c_main_~b~0 4294967296) .cse0)) (= (mod c_main_~A~0 4294967296) (mod (+ (* (div .cse1 2) (* c_main_~q~0 2)) c_main_~r~0) 4294967296)) (<= .cse1 .cse0))) is different from true [2022-03-17 16:22:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-03-17 16:22:35,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:22:35,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664495853] [2022-03-17 16:22:35,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:22:35,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888312629] [2022-03-17 16:22:35,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888312629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:22:35,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:22:35,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-03-17 16:22:35,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105615761] [2022-03-17 16:22:35,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:22:35,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 16:22:35,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:22:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 16:22:35,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=81, Unknown=3, NotChecked=38, Total=156 [2022-03-17 16:22:35,125 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 16:22:50,889 WARN L232 SmtUtils]: Spent 11.47s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 16:23:03,977 WARN L232 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 22 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 16:23:05,980 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 [] [2022-03-17 16:23:08,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 16:23:10,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 16:23:12,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 16:23:14,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 16:23:16,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 16:23:19,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 16:23:21,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 16:23:23,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 16:23:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:23:23,857 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-03-17 16:23:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 16:23:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-03-17 16:23:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:23:23,859 INFO L225 Difference]: With dead ends: 98 [2022-03-17 16:23:23,859 INFO L226 Difference]: Without dead ends: 98 [2022-03-17 16:23:23,859 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=55, Invalid=128, Unknown=7, NotChecked=50, Total=240 [2022-03-17 16:23:23,860 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2022-03-17 16:23:23,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 174 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 9 Unknown, 87 Unchecked, 19.9s Time] [2022-03-17 16:23:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-17 16:23:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-03-17 16:23:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 16:23:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2022-03-17 16:23:23,866 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 27 [2022-03-17 16:23:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:23:23,866 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2022-03-17 16:23:23,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 16:23:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2022-03-17 16:23:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 16:23:23,867 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:23:23,867 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:23:23,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 16:23:24,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 16:23:24,076 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:23:24,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:23:24,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1969058547, now seen corresponding path program 2 times [2022-03-17 16:23:24,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:23:24,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319656121] [2022-03-17 16:23:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:23:24,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:23:24,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:23:24,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022321206] [2022-03-17 16:23:24,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 16:23:24,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:23:24,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:23:24,111 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:23:24,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 16:23:24,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-17 16:23:24,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 16:23:24,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 16:23:24,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:23:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 16:23:24,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:23:24,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:23:24,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319656121] [2022-03-17 16:23:24,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:23:24,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022321206] [2022-03-17 16:23:24,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022321206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:23:24,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:23:24,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:23:24,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875096446] [2022-03-17 16:23:24,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:23:24,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:23:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:23:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:23:24,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:23:24,333 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:23:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:23:24,438 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2022-03-17 16:23:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:23:24,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 16:23:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:23:24,440 INFO L225 Difference]: With dead ends: 111 [2022-03-17 16:23:24,440 INFO L226 Difference]: Without dead ends: 110 [2022-03-17 16:23:24,440 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 16:23:24,441 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:23:24,441 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:23:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-17 16:23:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2022-03-17 16:23:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 77 states have internal predecessors, (89), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 16:23:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2022-03-17 16:23:24,450 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 29 [2022-03-17 16:23:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:23:24,450 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2022-03-17 16:23:24,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:23:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2022-03-17 16:23:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 16:23:24,451 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:23:24,451 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:23:24,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 16:23:24,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:23:24,652 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:23:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:23:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1849486682, now seen corresponding path program 2 times [2022-03-17 16:23:24,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:23:24,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232396120] [2022-03-17 16:23:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:23:24,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:23:24,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:23:24,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614606537] [2022-03-17 16:23:24,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 16:23:24,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:23:24,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:23:24,666 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:23:24,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process