/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/hard-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 19:33:01,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 19:33:01,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 19:33:02,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 19:33:02,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 19:33:02,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 19:33:02,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 19:33:02,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 19:33:02,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 19:33:02,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 19:33:02,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 19:33:02,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 19:33:02,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 19:33:02,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 19:33:02,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 19:33:02,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 19:33:02,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 19:33:02,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 19:33:02,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 19:33:02,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 19:33:02,050 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 19:33:02,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 19:33:02,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 19:33:02,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 19:33:02,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 19:33:02,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 19:33:02,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 19:33:02,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 19:33:02,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 19:33:02,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 19:33:02,071 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 19:33:02,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 19:33:02,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 19:33:02,073 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 19:33:02,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 19:33:02,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 19:33:02,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 19:33:02,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 19:33:02,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 19:33:02,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 19:33:02,074 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 19:33:02,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 19:33:02,074 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 19:33:02,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 19:33:02,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 19:33:02,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 19:33:02,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 19:33:02,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 19:33:02,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:33:02,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 19:33:02,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 19:33:02,075 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 19:33:02,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 19:33:02,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 19:33:02,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 19:33:02,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 19:33:02,260 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 19:33:02,260 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 19:33:02,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2022-03-18 19:33:02,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60764da87/8eee692b3cac4a52b484e0974b470046/FLAG44538f401 [2022-03-18 19:33:02,599 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 19:33:02,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2022-03-18 19:33:02,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60764da87/8eee692b3cac4a52b484e0974b470046/FLAG44538f401 [2022-03-18 19:33:02,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60764da87/8eee692b3cac4a52b484e0974b470046 [2022-03-18 19:33:02,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 19:33:02,619 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 19:33:02,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 19:33:02,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 19:33:02,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 19:33:02,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:33:02" (1/1) ... [2022-03-18 19:33:02,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6708b362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02, skipping insertion in model container [2022-03-18 19:33:02,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:33:02" (1/1) ... [2022-03-18 19:33:02,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 19:33:02,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 19:33:02,769 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c[538,551] [2022-03-18 19:33:02,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:33:02,784 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 19:33:02,791 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c[538,551] [2022-03-18 19:33:02,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:33:02,802 INFO L208 MainTranslator]: Completed translation [2022-03-18 19:33:02,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02 WrapperNode [2022-03-18 19:33:02,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 19:33:02,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 19:33:02,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 19:33:02,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 19:33:02,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02" (1/1) ... [2022-03-18 19:33:02,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02" (1/1) ... [2022-03-18 19:33:02,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02" (1/1) ... [2022-03-18 19:33:02,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02" (1/1) ... [2022-03-18 19:33:02,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02" (1/1) ... [2022-03-18 19:33:02,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02" (1/1) ... [2022-03-18 19:33:02,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02" (1/1) ... [2022-03-18 19:33:02,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 19:33:02,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 19:33:02,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 19:33:02,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 19:33:02,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02" (1/1) ... [2022-03-18 19:33:02,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:33:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:33:02,844 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) [2022-03-18 19:33:02,845 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 [2022-03-18 19:33:02,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 19:33:02,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 19:33:02,864 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 19:33:02,865 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 19:33:02,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 19:33:02,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 19:33:02,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 19:33:02,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 19:33:02,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 19:33:02,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 19:33:02,910 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 19:33:02,912 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 19:33:03,062 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 19:33:03,078 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 19:33:03,079 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 19:33:03,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:33:03 BoogieIcfgContainer [2022-03-18 19:33:03,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 19:33:03,080 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 19:33:03,080 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 19:33:03,081 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 19:33:03,083 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:33:03" (1/1) ... [2022-03-18 19:33:03,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:33:03 BasicIcfg [2022-03-18 19:33:03,103 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 19:33:03,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 19:33:03,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 19:33:03,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 19:33:03,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 07:33:02" (1/4) ... [2022-03-18 19:33:03,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c67a767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:33:03, skipping insertion in model container [2022-03-18 19:33:03,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:33:02" (2/4) ... [2022-03-18 19:33:03,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c67a767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:33:03, skipping insertion in model container [2022-03-18 19:33:03,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:33:03" (3/4) ... [2022-03-18 19:33:03,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c67a767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:33:03, skipping insertion in model container [2022-03-18 19:33:03,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:33:03" (4/4) ... [2022-03-18 19:33:03,111 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound1.cJordan [2022-03-18 19:33:03,133 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 19:33:03,133 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 19:33:03,176 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 19:33:03,183 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 [2022-03-18 19:33:03,183 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 19:33:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 19:33:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 19:33:03,201 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:03,201 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:03,201 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:03,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-03-18 19:33:03,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:03,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237308321] [2022-03-18 19:33:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:03,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:33:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:33:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 19:33:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 19:33:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:33:03,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:03,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237308321] [2022-03-18 19:33:03,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237308321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:33:03,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:33:03,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 19:33:03,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132705332] [2022-03-18 19:33:03,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:33:03,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 19:33:03,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:03,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 19:33:03,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:33:03,399 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:33:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:03,463 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-03-18 19:33:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 19:33:03,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-18 19:33:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:03,469 INFO L225 Difference]: With dead ends: 38 [2022-03-18 19:33:03,469 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 19:33:03,470 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:33:03,474 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:03,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:33:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 19:33:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 19:33:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 19:33:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-18 19:33:03,496 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-18 19:33:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:03,496 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-18 19:33:03,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:33:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-18 19:33:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 19:33:03,498 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:03,498 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:03,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 19:33:03,498 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:03,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-03-18 19:33:03,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:03,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942189413] [2022-03-18 19:33:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:03,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:33:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:33:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 19:33:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 19:33:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:33:03,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:03,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942189413] [2022-03-18 19:33:03,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942189413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:33:03,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:33:03,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:33:03,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022694090] [2022-03-18 19:33:03,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:33:03,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:33:03,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:33:03,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:33:03,583 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 19:33:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:03,738 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-03-18 19:33:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 19:33:03,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-18 19:33:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:03,741 INFO L225 Difference]: With dead ends: 44 [2022-03-18 19:33:03,742 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 19:33:03,747 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:33:03,749 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:03,753 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:33:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 19:33:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-18 19:33:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 19:33:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-18 19:33:03,764 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-18 19:33:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:03,764 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-18 19:33:03,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 19:33:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-18 19:33:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 19:33:03,765 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:03,765 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:03,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 19:33:03,765 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:03,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-03-18 19:33:03,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:03,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814384932] [2022-03-18 19:33:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:33:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:33:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 19:33:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 19:33:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 19:33:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:33:03,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814384932] [2022-03-18 19:33:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814384932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:33:03,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:33:03,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:33:03,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356982281] [2022-03-18 19:33:03,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:33:03,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:33:03,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:33:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:33:03,858 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 19:33:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:03,997 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-03-18 19:33:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 19:33:03,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-18 19:33:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:03,999 INFO L225 Difference]: With dead ends: 48 [2022-03-18 19:33:03,999 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 19:33:03,999 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:33:04,005 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:04,007 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:33:04,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 19:33:04,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-18 19:33:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 19:33:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-18 19:33:04,020 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-18 19:33:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:04,021 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-18 19:33:04,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 19:33:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-18 19:33:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 19:33:04,022 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:04,022 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:04,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 19:33:04,022 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:04,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-03-18 19:33:04,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:04,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221158220] [2022-03-18 19:33:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:04,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:04,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:33:04,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452393336] [2022-03-18 19:33:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:04,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:33:04,041 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) [2022-03-18 19:33:04,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 19:33:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:04,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 19:33:04,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:33:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 19:33:04,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:33:04,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:04,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221158220] [2022-03-18 19:33:04,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:33:04,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452393336] [2022-03-18 19:33:04,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452393336] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:33:04,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:33:04,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 19:33:04,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849962488] [2022-03-18 19:33:04,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:33:04,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 19:33:04,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:04,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 19:33:04,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-18 19:33:04,373 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 19:33:04,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:04,465 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-03-18 19:33:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 19:33:04,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2022-03-18 19:33:04,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:04,466 INFO L225 Difference]: With dead ends: 56 [2022-03-18 19:33:04,466 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 19:33:04,466 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:33:04,467 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:04,467 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 225 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:33:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 19:33:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 19:33:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 19:33:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-18 19:33:04,472 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-18 19:33:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:04,472 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-18 19:33:04,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 19:33:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-18 19:33:04,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 19:33:04,473 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:04,473 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:04,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 19:33:04,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:04,690 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:04,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-03-18 19:33:04,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:04,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089165700] [2022-03-18 19:33:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:04,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:04,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:33:04,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121557906] [2022-03-18 19:33:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:04,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:04,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:33:04,708 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) [2022-03-18 19:33:04,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 19:33:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:04,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 19:33:04,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:33:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 19:33:05,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:33:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 19:33:05,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:05,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089165700] [2022-03-18 19:33:05,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:33:05,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121557906] [2022-03-18 19:33:05,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121557906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:33:05,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:33:05,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-03-18 19:33:05,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542101127] [2022-03-18 19:33:05,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:33:05,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 19:33:05,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:05,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 19:33:05,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-18 19:33:05,236 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 19:33:05,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:05,418 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-18 19:33:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 19:33:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45 [2022-03-18 19:33:05,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:05,419 INFO L225 Difference]: With dead ends: 74 [2022-03-18 19:33:05,419 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 19:33:05,419 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-18 19:33:05,420 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:05,420 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 232 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:33:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 19:33:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-03-18 19:33:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 19:33:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-03-18 19:33:05,424 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 45 [2022-03-18 19:33:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:05,424 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-03-18 19:33:05,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 19:33:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-03-18 19:33:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 19:33:05,425 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:05,425 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:05,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 19:33:05,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:05,626 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:05,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:05,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-03-18 19:33:05,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:05,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434008247] [2022-03-18 19:33:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:05,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:05,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:33:05,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978585193] [2022-03-18 19:33:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:05,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:05,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:33:05,638 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) [2022-03-18 19:33:05,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 19:33:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:05,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 19:33:05,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:33:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-18 19:33:05,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:33:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 19:33:06,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434008247] [2022-03-18 19:33:06,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:33:06,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978585193] [2022-03-18 19:33:06,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978585193] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 19:33:06,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:33:06,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-18 19:33:06,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493381411] [2022-03-18 19:33:06,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:33:06,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:33:06,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:06,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:33:06,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:33:06,039 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 19:33:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:06,079 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-03-18 19:33:06,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:33:06,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-18 19:33:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:06,082 INFO L225 Difference]: With dead ends: 77 [2022-03-18 19:33:06,082 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 19:33:06,082 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 19:33:06,084 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:06,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:33:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 19:33:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-03-18 19:33:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 19:33:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-03-18 19:33:06,101 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 55 [2022-03-18 19:33:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:06,102 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-03-18 19:33:06,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 19:33:06,102 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-03-18 19:33:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 19:33:06,106 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:06,106 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:06,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 19:33:06,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:06,311 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:06,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:06,312 INFO L85 PathProgramCache]: Analyzing trace with hash -920366345, now seen corresponding path program 1 times [2022-03-18 19:33:06,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:06,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799068136] [2022-03-18 19:33:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:06,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:06,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:33:06,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173311657] [2022-03-18 19:33:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:06,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:06,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:33:06,325 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) [2022-03-18 19:33:06,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 19:33:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:06,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 19:33:06,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:33:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-18 19:33:06,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:33:06,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:06,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799068136] [2022-03-18 19:33:06,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:33:06,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173311657] [2022-03-18 19:33:06,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173311657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:33:06,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:33:06,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 19:33:06,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218223843] [2022-03-18 19:33:06,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:33:06,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 19:33:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 19:33:06,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-18 19:33:06,467 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-18 19:33:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:06,488 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-03-18 19:33:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 19:33:06,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-03-18 19:33:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:06,490 INFO L225 Difference]: With dead ends: 75 [2022-03-18 19:33:06,490 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 19:33:06,490 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-18 19:33:06,491 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:06,491 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 111 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:33:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 19:33:06,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-18 19:33:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 19:33:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-03-18 19:33:06,502 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 73 [2022-03-18 19:33:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:06,502 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-03-18 19:33:06,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-18 19:33:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-03-18 19:33:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 19:33:06,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:06,503 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:06,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 19:33:06,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:06,711 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:06,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2022-03-18 19:33:06,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:06,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216095753] [2022-03-18 19:33:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:06,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:06,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:33:06,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219517643] [2022-03-18 19:33:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:06,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:33:06,737 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) [2022-03-18 19:33:06,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 19:33:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 19:33:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:33:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-18 19:33:07,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:33:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-18 19:33:08,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216095753] [2022-03-18 19:33:08,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:33:08,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219517643] [2022-03-18 19:33:08,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219517643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:33:08,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:33:08,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-03-18 19:33:08,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604455936] [2022-03-18 19:33:08,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:33:08,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 19:33:08,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:08,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 19:33:08,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-18 19:33:08,356 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-18 19:33:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:09,324 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2022-03-18 19:33:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 19:33:09,324 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 75 [2022-03-18 19:33:09,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:09,325 INFO L225 Difference]: With dead ends: 104 [2022-03-18 19:33:09,326 INFO L226 Difference]: Without dead ends: 104 [2022-03-18 19:33:09,326 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-18 19:33:09,326 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:09,326 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 289 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 19:33:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-18 19:33:09,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2022-03-18 19:33:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-18 19:33:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2022-03-18 19:33:09,330 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 75 [2022-03-18 19:33:09,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:09,330 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2022-03-18 19:33:09,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-18 19:33:09,331 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2022-03-18 19:33:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 19:33:09,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:09,331 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:09,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 19:33:09,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:09,542 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:09,543 INFO L85 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2022-03-18 19:33:09,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:09,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118345214] [2022-03-18 19:33:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:09,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:09,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:33:09,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600515734] [2022-03-18 19:33:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:09,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:09,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:33:09,551 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) [2022-03-18 19:33:09,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 19:33:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:09,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 19:33:09,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:33:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-18 19:33:11,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:33:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-18 19:33:14,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:14,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118345214] [2022-03-18 19:33:14,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:33:14,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600515734] [2022-03-18 19:33:14,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600515734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:33:14,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:33:14,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-03-18 19:33:14,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553594129] [2022-03-18 19:33:14,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:33:14,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 19:33:14,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:14,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 19:33:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-18 19:33:14,716 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-03-18 19:33:19,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:19,440 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2022-03-18 19:33:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 19:33:19,440 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 86 [2022-03-18 19:33:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:19,441 INFO L225 Difference]: With dead ends: 137 [2022-03-18 19:33:19,441 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 19:33:19,442 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2022-03-18 19:33:19,442 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 61 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:19,442 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 407 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 19:33:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 19:33:19,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2022-03-18 19:33:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 74 states have internal predecessors, (82), 31 states have call successors, (31), 16 states have call predecessors, (31), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-18 19:33:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2022-03-18 19:33:19,447 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 86 [2022-03-18 19:33:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:19,447 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2022-03-18 19:33:19,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-03-18 19:33:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2022-03-18 19:33:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 19:33:19,448 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:19,448 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:19,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 19:33:19,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:19,655 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash 966352941, now seen corresponding path program 1 times [2022-03-18 19:33:19,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:19,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567057993] [2022-03-18 19:33:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:19,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:19,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:33:19,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564278207] [2022-03-18 19:33:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:19,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:19,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:33:19,663 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) [2022-03-18 19:33:19,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 19:33:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:33:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 19:33:19,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:33:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-18 19:33:19,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:33:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-18 19:33:20,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567057993] [2022-03-18 19:33:20,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:33:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564278207] [2022-03-18 19:33:20,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564278207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:33:20,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:33:20,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-18 19:33:20,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37996237] [2022-03-18 19:33:20,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:33:20,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 19:33:20,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 19:33:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:33:20,197 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-18 19:33:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:20,478 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2022-03-18 19:33:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 19:33:20,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-03-18 19:33:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:20,480 INFO L225 Difference]: With dead ends: 125 [2022-03-18 19:33:20,480 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 19:33:20,481 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:33:20,481 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:20,481 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 282 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 19:33:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 19:33:20,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-18 19:33:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 66 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 19:33:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-18 19:33:20,485 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 91 [2022-03-18 19:33:20,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:20,485 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-18 19:33:20,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-18 19:33:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-18 19:33:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-18 19:33:20,486 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:20,486 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:20,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 19:33:20,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:20,703 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:20,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:20,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1448579276, now seen corresponding path program 2 times [2022-03-18 19:33:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606010928] [2022-03-18 19:33:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:20,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:20,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:33:20,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166213543] [2022-03-18 19:33:20,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:33:20,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:20,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:33:20,717 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) [2022-03-18 19:33:20,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 19:33:20,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:33:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:33:20,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 19:33:20,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:33:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 93 proven. 4 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-03-18 19:33:20,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:33:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-03-18 19:33:21,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:21,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606010928] [2022-03-18 19:33:21,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:33:21,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166213543] [2022-03-18 19:33:21,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166213543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:33:21,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:33:21,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-18 19:33:21,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889711695] [2022-03-18 19:33:21,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:33:21,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:33:21,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:21,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:33:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:33:21,147 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 19:33:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:21,216 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2022-03-18 19:33:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:33:21,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2022-03-18 19:33:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:21,217 INFO L225 Difference]: With dead ends: 101 [2022-03-18 19:33:21,217 INFO L226 Difference]: Without dead ends: 101 [2022-03-18 19:33:21,217 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:33:21,217 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:21,218 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:33:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-18 19:33:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-18 19:33:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 19:33:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2022-03-18 19:33:21,222 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 108 [2022-03-18 19:33:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:21,223 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2022-03-18 19:33:21,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 19:33:21,223 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2022-03-18 19:33:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 19:33:21,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:33:21,224 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:21,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 19:33:21,440 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,SelfDestructingSolverStorable10 [2022-03-18 19:33:21,441 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:33:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:33:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1498631042, now seen corresponding path program 2 times [2022-03-18 19:33:21,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:33:21,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950410425] [2022-03-18 19:33:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:33:21,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:33:21,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:33:21,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084895694] [2022-03-18 19:33:21,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:33:21,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:21,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:33:21,452 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) [2022-03-18 19:33:21,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 19:33:21,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:33:21,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:33:21,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 19:33:21,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:33:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 234 proven. 21 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-03-18 19:33:21,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:33:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-18 19:33:22,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:33:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950410425] [2022-03-18 19:33:22,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:33:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084895694] [2022-03-18 19:33:22,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084895694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:33:22,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:33:22,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-18 19:33:22,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536600639] [2022-03-18 19:33:22,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:33:22,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 19:33:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:33:22,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 19:33:22,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-18 19:33:22,050 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-03-18 19:33:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:33:22,161 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-03-18 19:33:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 19:33:22,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 116 [2022-03-18 19:33:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:33:22,161 INFO L225 Difference]: With dead ends: 62 [2022-03-18 19:33:22,162 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 19:33:22,162 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-18 19:33:22,162 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:33:22,162 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 270 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:33:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 19:33:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 19:33:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 19:33:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 19:33:22,163 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-03-18 19:33:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:33:22,163 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 19:33:22,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-03-18 19:33:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 19:33:22,163 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 19:33:22,165 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 19:33:22,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 19:33:22,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:33:22,377 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:33:22,378 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 19:33:22,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:33:22 BasicIcfg [2022-03-18 19:33:22,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 19:33:22,380 INFO L158 Benchmark]: Toolchain (without parser) took 19760.91ms. Allocated memory was 178.3MB in the beginning and 260.0MB in the end (delta: 81.8MB). Free memory was 128.6MB in the beginning and 108.3MB in the end (delta: 20.3MB). Peak memory consumption was 103.0MB. Max. memory is 8.0GB. [2022-03-18 19:33:22,380 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory was 144.9MB in the beginning and 144.8MB in the end (delta: 74.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 19:33:22,380 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.45ms. Allocated memory is still 178.3MB. Free memory was 128.4MB in the beginning and 153.7MB in the end (delta: -25.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 19:33:22,381 INFO L158 Benchmark]: Boogie Preprocessor took 21.37ms. Allocated memory is still 178.3MB. Free memory was 153.7MB in the beginning and 152.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 19:33:22,381 INFO L158 Benchmark]: RCFGBuilder took 254.90ms. Allocated memory is still 178.3MB. Free memory was 152.0MB in the beginning and 141.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 19:33:22,381 INFO L158 Benchmark]: IcfgTransformer took 22.55ms. Allocated memory is still 178.3MB. Free memory was 141.6MB in the beginning and 140.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 19:33:22,381 INFO L158 Benchmark]: TraceAbstraction took 19275.98ms. Allocated memory was 178.3MB in the beginning and 260.0MB in the end (delta: 81.8MB). Free memory was 139.8MB in the beginning and 108.3MB in the end (delta: 31.5MB). Peak memory consumption was 114.0MB. Max. memory is 8.0GB. [2022-03-18 19:33:22,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory was 144.9MB in the beginning and 144.8MB in the end (delta: 74.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 181.45ms. Allocated memory is still 178.3MB. Free memory was 128.4MB in the beginning and 153.7MB in the end (delta: -25.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.37ms. Allocated memory is still 178.3MB. Free memory was 153.7MB in the beginning and 152.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 254.90ms. Allocated memory is still 178.3MB. Free memory was 152.0MB in the beginning and 141.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 22.55ms. Allocated memory is still 178.3MB. Free memory was 141.6MB in the beginning and 140.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 19275.98ms. Allocated memory was 178.3MB in the beginning and 260.0MB in the end (delta: 81.8MB). Free memory was 139.8MB in the beginning and 108.3MB in the end (delta: 31.5MB). Peak memory consumption was 114.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.2s, OverallIterations: 12, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 366 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 319 mSDsluCounter, 2223 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1718 mSDsCounter, 416 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1314 IncrementalHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 416 mSolverCounterUnsat, 505 mSDtfsCounter, 1314 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1335 GetRequests, 1193 SyntacticMatches, 12 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=9, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 776 NumberOfCodeBlocks, 776 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1333 ConstructedInterpolants, 0 QuantifiedInterpolants, 7037 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1620 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 19 InterpolantComputations, 6 PerfectInterpolantSequences, 3367/3483 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-18 19:33:22,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...