/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 21:19:50,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 21:19:50,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 21:19:50,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 21:19:50,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 21:19:50,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 21:19:50,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 21:19:50,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 21:19:50,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 21:19:50,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 21:19:50,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 21:19:50,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 21:19:50,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 21:19:50,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 21:19:50,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 21:19:50,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 21:19:50,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 21:19:50,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 21:19:50,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 21:19:50,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 21:19:50,826 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 21:19:50,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 21:19:50,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 21:19:50,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 21:19:50,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 21:19:50,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 21:19:50,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 21:19:50,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 21:19:50,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 21:19:50,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 21:19:50,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 21:19:50,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 21:19:50,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 21:19:50,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 21:19:50,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 21:19:50,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 21:19:50,876 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 21:19:50,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 21:19:50,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 21:19:50,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 21:19:50,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 21:19:50,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 21:19:50,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 21:19:50,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 21:19:50,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 21:19:50,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 21:19:50,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 21:19:50,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 21:19:50,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 21:19:50,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:19:50,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 21:19:50,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 21:19:50,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 21:19:50,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 21:19:50,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 21:19:50,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 21:19:50,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 21:19:50,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 21:19:50,883 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 21:19:50,883 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 21:19:51,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 21:19:51,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 21:19:51,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 21:19:51,145 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 21:19:51,146 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 21:19:51,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c [2022-03-17 21:19:51,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/669e92a8f/379181ec513240b8ab2f587b32fb0a62/FLAG553ef634f [2022-03-17 21:19:51,695 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 21:19:51,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c [2022-03-17 21:19:51,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/669e92a8f/379181ec513240b8ab2f587b32fb0a62/FLAG553ef634f [2022-03-17 21:19:52,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/669e92a8f/379181ec513240b8ab2f587b32fb0a62 [2022-03-17 21:19:52,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 21:19:52,107 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 21:19:52,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 21:19:52,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 21:19:52,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 21:19:52,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f028d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52, skipping insertion in model container [2022-03-17 21:19:52,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 21:19:52,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 21:19:52,282 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/egcd-ll_valuebound10.c[489,502] [2022-03-17 21:19:52,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:19:52,325 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 21:19:52,335 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/egcd-ll_valuebound10.c[489,502] [2022-03-17 21:19:52,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:19:52,353 INFO L208 MainTranslator]: Completed translation [2022-03-17 21:19:52,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52 WrapperNode [2022-03-17 21:19:52,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 21:19:52,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 21:19:52,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 21:19:52,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 21:19:52,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 21:19:52,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 21:19:52,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 21:19:52,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 21:19:52,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:19:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:19:52,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 21:19:52,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 21:19:52,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 21:19:52,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 21:19:52,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 21:19:52,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 21:19:52,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 21:19:52,461 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 21:19:52,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 21:19:52,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 21:19:52,465 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 21:19:52,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 21:19:52,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 21:19:52,465 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 21:19:52,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 21:19:52,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 21:19:52,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 21:19:52,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 21:19:52,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 21:19:52,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 21:19:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 21:19:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 21:19:52,538 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 21:19:52,540 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 21:19:52,684 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 21:19:52,706 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 21:19:52,707 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 21:19:52,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:19:52 BoogieIcfgContainer [2022-03-17 21:19:52,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 21:19:52,709 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 21:19:52,709 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 21:19:52,716 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 21:19:52,719 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:19:52" (1/1) ... [2022-03-17 21:19:52,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:19:52 BasicIcfg [2022-03-17 21:19:52,742 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 21:19:52,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 21:19:52,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 21:19:52,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 21:19:52,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 09:19:52" (1/4) ... [2022-03-17 21:19:52,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51553288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:19:52, skipping insertion in model container [2022-03-17 21:19:52,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:19:52" (2/4) ... [2022-03-17 21:19:52,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51553288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:19:52, skipping insertion in model container [2022-03-17 21:19:52,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:19:52" (3/4) ... [2022-03-17 21:19:52,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51553288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:19:52, skipping insertion in model container [2022-03-17 21:19:52,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:19:52" (4/4) ... [2022-03-17 21:19:52,750 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound10.cqvasr [2022-03-17 21:19:52,755 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 21:19:52,755 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 21:19:52,797 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 21:19:52,804 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 21:19:52,804 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 21:19:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 21:19:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 21:19:52,843 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:19:52,844 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:19:52,844 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:19:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:19:52,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2022-03-17 21:19:52,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:19:52,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278575953] [2022-03-17 21:19:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:52,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:19:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:53,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 21:19:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:53,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 21:19:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:53,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 21:19:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:53,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 21:19:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:53,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-17 21:19:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:19:53,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:19:53,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278575953] [2022-03-17 21:19:53,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278575953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:19:53,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:19:53,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 21:19:53,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264305259] [2022-03-17 21:19:53,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:19:53,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 21:19:53,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:19:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 21:19:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:19:53,124 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:19:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:19:53,265 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-03-17 21:19:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 21:19:53,268 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-17 21:19:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:19:53,275 INFO L225 Difference]: With dead ends: 67 [2022-03-17 21:19:53,276 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 21:19:53,279 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:19:53,283 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:19:53,286 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:19:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 21:19:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-17 21:19:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 21:19:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-17 21:19:53,342 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-03-17 21:19:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:19:53,343 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-17 21:19:53,344 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:19:53,344 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-17 21:19:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 21:19:53,347 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:19:53,348 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:19:53,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 21:19:53,349 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:19:53,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:19:53,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2022-03-17 21:19:53,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:19:53,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014496417] [2022-03-17 21:19:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:53,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:19:53,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:19:53,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154008053] [2022-03-17 21:19:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:53,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:53,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:19:53,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:19:53,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 21:19:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:53,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:19:53,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:19:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:19:53,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:19:53,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:19:53,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014496417] [2022-03-17 21:19:53,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:19:53,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154008053] [2022-03-17 21:19:53,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154008053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:19:53,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:19:53,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:19:53,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884979800] [2022-03-17 21:19:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:19:53,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:19:53,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:19:53,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:19:53,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:19:53,681 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:19:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:19:53,801 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-03-17 21:19:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:19:53,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-03-17 21:19:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:19:53,803 INFO L225 Difference]: With dead ends: 48 [2022-03-17 21:19:53,803 INFO L226 Difference]: Without dead ends: 46 [2022-03-17 21:19:53,803 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:19:53,804 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:19:53,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:19:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-17 21:19:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-17 21:19:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 21:19:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-03-17 21:19:53,819 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-03-17 21:19:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:19:53,819 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-03-17 21:19:53,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:19:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-03-17 21:19:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 21:19:53,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:19:53,821 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 21:19:53,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 21:19:54,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:54,022 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:19:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:19:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2022-03-17 21:19:54,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:19:54,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735407389] [2022-03-17 21:19:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:54,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:19:54,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:19:54,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318549339] [2022-03-17 21:19:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:54,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:54,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:19:54,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:19:54,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 21:19:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:54,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:19:54,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:19:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:19:54,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:19:54,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:19:54,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735407389] [2022-03-17 21:19:54,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:19:54,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318549339] [2022-03-17 21:19:54,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318549339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:19:54,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:19:54,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:19:54,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376744433] [2022-03-17 21:19:54,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:19:54,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:19:54,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:19:54,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:19:54,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:19:54,280 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 21:19:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:19:54,333 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-03-17 21:19:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:19:54,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-17 21:19:54,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:19:54,335 INFO L225 Difference]: With dead ends: 52 [2022-03-17 21:19:54,335 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 21:19:54,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:19:54,336 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:19:54,337 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:19:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 21:19:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-17 21:19:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 21:19:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-03-17 21:19:54,346 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-03-17 21:19:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:19:54,347 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-03-17 21:19:54,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 21:19:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-03-17 21:19:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 21:19:54,350 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:19:54,351 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2022-03-17 21:19:54,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 21:19:54,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 21:19:54,568 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:19:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:19:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2022-03-17 21:19:54,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:19:54,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281083536] [2022-03-17 21:19:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:54,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:19:54,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:19:54,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795756546] [2022-03-17 21:19:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:54,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:54,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:19:54,588 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:19:54,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 21:19:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:54,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 21:19:54,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:19:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 21:19:54,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:19:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 21:19:55,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:19:55,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281083536] [2022-03-17 21:19:55,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:19:55,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795756546] [2022-03-17 21:19:55,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795756546] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:19:55,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:19:55,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 21:19:55,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979493334] [2022-03-17 21:19:55,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:19:55,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:19:55,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:19:55,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:19:55,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:19:55,067 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-03-17 21:19:55,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:19:55,119 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-03-17 21:19:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:19:55,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 43 [2022-03-17 21:19:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:19:55,122 INFO L225 Difference]: With dead ends: 74 [2022-03-17 21:19:55,122 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 21:19:55,123 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:19:55,124 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:19:55,124 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:19:55,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 21:19:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-17 21:19:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-17 21:19:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-03-17 21:19:55,138 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-03-17 21:19:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:19:55,139 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-03-17 21:19:55,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-03-17 21:19:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-03-17 21:19:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-17 21:19:55,140 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:19:55,140 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:19:55,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 21:19:55,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:55,356 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:19:55,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:19:55,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2022-03-17 21:19:55,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:19:55,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974983772] [2022-03-17 21:19:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:55,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:19:55,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:19:55,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816738634] [2022-03-17 21:19:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:55,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:55,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:19:55,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:19:55,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 21:19:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 21:19:55,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:19:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 21:19:55,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:19:55,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:19:55,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974983772] [2022-03-17 21:19:55,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:19:55,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816738634] [2022-03-17 21:19:55,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816738634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:19:55,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:19:55,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:19:55,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333106123] [2022-03-17 21:19:55,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:19:55,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:19:55,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:19:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:19:55,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:19:55,533 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 21:19:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:19:55,572 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-17 21:19:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:19:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-03-17 21:19:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:19:55,574 INFO L225 Difference]: With dead ends: 76 [2022-03-17 21:19:55,574 INFO L226 Difference]: Without dead ends: 74 [2022-03-17 21:19:55,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:19:55,575 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:19:55,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:19:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-17 21:19:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-17 21:19:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-17 21:19:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-03-17 21:19:55,591 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-03-17 21:19:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:19:55,593 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-03-17 21:19:55,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 21:19:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-03-17 21:19:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 21:19:55,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:19:55,595 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1] [2022-03-17 21:19:55,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 21:19:55,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:55,824 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:19:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:19:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1737902154, now seen corresponding path program 1 times [2022-03-17 21:19:55,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:19:55,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228183687] [2022-03-17 21:19:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:55,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:19:55,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:19:55,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353390011] [2022-03-17 21:19:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:55,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:55,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:19:55,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:19:55,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 21:19:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 21:19:55,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:19:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-17 21:19:56,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:19:56,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:19:56,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228183687] [2022-03-17 21:19:56,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:19:56,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353390011] [2022-03-17 21:19:56,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353390011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:19:56,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:19:56,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:19:56,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602770953] [2022-03-17 21:19:56,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:19:56,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:19:56,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:19:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:19:56,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:19:56,069 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 21:19:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:19:56,127 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-03-17 21:19:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:19:56,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-17 21:19:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:19:56,130 INFO L225 Difference]: With dead ends: 84 [2022-03-17 21:19:56,130 INFO L226 Difference]: Without dead ends: 81 [2022-03-17 21:19:56,130 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:19:56,131 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:19:56,131 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:19:56,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-17 21:19:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-17 21:19:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-17 21:19:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-03-17 21:19:56,143 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-03-17 21:19:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:19:56,144 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-03-17 21:19:56,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 21:19:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-03-17 21:19:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-17 21:19:56,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:19:56,145 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:19:56,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 21:19:56,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:56,365 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:19:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:19:56,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2022-03-17 21:19:56,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:19:56,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777435576] [2022-03-17 21:19:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:56,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:19:56,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:19:56,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582312866] [2022-03-17 21:19:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:56,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:56,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:19:56,385 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:19:56,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 21:19:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:56,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 21:19:56,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:19:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-17 21:19:56,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:19:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-17 21:19:56,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:19:56,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777435576] [2022-03-17 21:19:56,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:19:56,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582312866] [2022-03-17 21:19:56,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582312866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:19:56,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:19:56,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 21:19:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025284141] [2022-03-17 21:19:56,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:19:56,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 21:19:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:19:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 21:19:56,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-17 21:19:56,727 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 21:19:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:19:56,864 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-03-17 21:19:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 21:19:56,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-03-17 21:19:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:19:56,866 INFO L225 Difference]: With dead ends: 88 [2022-03-17 21:19:56,866 INFO L226 Difference]: Without dead ends: 84 [2022-03-17 21:19:56,866 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-17 21:19:56,867 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:19:56,867 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 179 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:19:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-17 21:19:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-17 21:19:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-17 21:19:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-03-17 21:19:56,878 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-03-17 21:19:56,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:19:56,878 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-03-17 21:19:56,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 21:19:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-03-17 21:19:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-17 21:19:56,879 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:19:56,879 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-03-17 21:19:56,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 21:19:57,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:57,102 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:19:57,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:19:57,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 2 times [2022-03-17 21:19:57,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:19:57,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992098244] [2022-03-17 21:19:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:57,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:19:57,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:19:57,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912265762] [2022-03-17 21:19:57,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:19:57,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:57,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:19:57,118 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:19:57,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 21:19:57,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:19:57,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:19:57,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 21:19:57,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:19:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-17 21:19:57,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:19:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-17 21:19:57,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:19:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992098244] [2022-03-17 21:19:57,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:19:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912265762] [2022-03-17 21:19:57,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912265762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:19:57,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:19:57,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 21:19:57,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327330308] [2022-03-17 21:19:57,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:19:57,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 21:19:57,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:19:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 21:19:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:19:57,508 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-17 21:19:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:19:58,072 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2022-03-17 21:19:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 21:19:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 56 [2022-03-17 21:19:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:19:58,075 INFO L225 Difference]: With dead ends: 110 [2022-03-17 21:19:58,075 INFO L226 Difference]: Without dead ends: 103 [2022-03-17 21:19:58,075 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:19:58,076 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 21:19:58,076 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 205 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 21:19:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-17 21:19:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 88. [2022-03-17 21:19:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 21:19:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-03-17 21:19:58,088 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 56 [2022-03-17 21:19:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:19:58,089 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-03-17 21:19:58,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-17 21:19:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-03-17 21:19:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-17 21:19:58,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:19:58,090 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2022-03-17 21:19:58,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 21:19:58,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:58,316 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:19:58,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:19:58,316 INFO L85 PathProgramCache]: Analyzing trace with hash -296466288, now seen corresponding path program 1 times [2022-03-17 21:19:58,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:19:58,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820201663] [2022-03-17 21:19:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:58,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:19:58,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:19:58,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603318710] [2022-03-17 21:19:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:19:58,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:19:58,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:19:58,330 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:19:58,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 21:19:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:19:58,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 21:19:58,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:19:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 21:19:58,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:19:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-17 21:19:58,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:19:58,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820201663] [2022-03-17 21:19:58,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:19:58,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603318710] [2022-03-17 21:19:58,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603318710] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:19:58,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:19:58,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-17 21:19:58,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568282374] [2022-03-17 21:19:58,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:19:58,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:19:58,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:19:58,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:19:58,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:19:58,803 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 21:19:58,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:19:58,846 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2022-03-17 21:19:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:19:58,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-03-17 21:19:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:19:58,847 INFO L225 Difference]: With dead ends: 88 [2022-03-17 21:19:58,847 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 21:19:58,848 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 21:19:58,849 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:19:58,849 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 118 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:19:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 21:19:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 21:19:58,850 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) [2022-03-17 21:19:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 21:19:58,850 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2022-03-17 21:19:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:19:58,850 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 21:19:58,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 21:19:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 21:19:58,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 21:19:58,853 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 21:19:58,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 21:19:59,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 21:19:59,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 21:20:02,278 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 21:20:02,278 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 21:20:02,278 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 21:20:02,278 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 21:20:02,278 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 21:20:02,278 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 21:20:02,278 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 21:20:02,278 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-03-17 21:20:02,278 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-03-17 21:20:02,278 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-03-17 21:20:02,278 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-03-17 21:20:02,279 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 59) the Hoare annotation is: true [2022-03-17 21:20:02,279 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-03-17 21:20:02,279 INFO L882 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-03-17 21:20:02,279 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-17 21:20:02,279 INFO L885 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: true [2022-03-17 21:20:02,279 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-17 21:20:02,279 INFO L882 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-03-17 21:20:02,279 INFO L878 garLoopResultBuilder]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~a~0 (+ .cse0 .cse1)) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)))) [2022-03-17 21:20:02,279 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (let ((.cse2 (+ .cse0 .cse1))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~b~0 .cse2) (= main_~a~0 .cse2) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))))) [2022-03-17 21:20:02,279 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~a~0 (+ .cse0 .cse1)) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)))) [2022-03-17 21:20:02,279 INFO L878 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (let ((.cse2 (+ .cse0 .cse1))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~b~0 .cse2) (= main_~a~0 .cse2) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))))) [2022-03-17 21:20:02,280 INFO L878 garLoopResultBuilder]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~a~0 (+ .cse0 .cse1)) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)))) [2022-03-17 21:20:02,280 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse3 (* main_~q~0 main_~x~0)) (.cse4 (* main_~y~0 main_~s~0))) (let ((.cse0 (= main_~b~0 (+ .cse3 .cse4))) (.cse1 (= main_~s~0 1)) (.cse2 (= main_~p~0 1))) (or (and (= main_~b~0 main_~a~0) .cse0 .cse1 (= main_~q~0 0) .cse2) (let ((.cse5 (* main_~y~0 main_~r~0)) (.cse6 (* main_~p~0 main_~x~0))) (let ((.cse7 (+ .cse5 .cse6))) (and (= (+ .cse3 main_~a~0 .cse4) (+ .cse5 main_~b~0 .cse6)) (= main_~b~0 .cse7) (= main_~a~0 .cse7) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))))) (and (= main_~r~0 0) .cse0 .cse1 (= main_~a~0 main_~x~0) .cse2)))) [2022-03-17 21:20:02,280 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~a~0 (+ .cse0 .cse1)) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)))) [2022-03-17 21:20:02,280 INFO L878 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) [2022-03-17 21:20:02,280 INFO L882 garLoopResultBuilder]: For program point L38(lines 35 52) no Hoare annotation was computed. [2022-03-17 21:20:02,280 INFO L882 garLoopResultBuilder]: For program point L57(line 57) no Hoare annotation was computed. [2022-03-17 21:20:02,280 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 51) no Hoare annotation was computed. [2022-03-17 21:20:02,280 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 59) no Hoare annotation was computed. [2022-03-17 21:20:02,280 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 59) no Hoare annotation was computed. [2022-03-17 21:20:02,280 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-03-17 21:20:02,281 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-03-17 21:20:02,281 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-03-17 21:20:02,281 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-03-17 21:20:02,281 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-03-17 21:20:02,281 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-03-17 21:20:02,284 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:20:02,286 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 21:20:02,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:20:02 BasicIcfg [2022-03-17 21:20:02,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 21:20:02,301 INFO L158 Benchmark]: Toolchain (without parser) took 10193.98ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 130.2MB in the beginning and 118.6MB in the end (delta: 11.6MB). Peak memory consumption was 47.9MB. Max. memory is 8.0GB. [2022-03-17 21:20:02,301 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 178.3MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 21:20:02,302 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.47ms. Allocated memory is still 178.3MB. Free memory was 130.0MB in the beginning and 157.2MB in the end (delta: -27.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 21:20:02,302 INFO L158 Benchmark]: Boogie Preprocessor took 31.17ms. Allocated memory is still 178.3MB. Free memory was 157.2MB in the beginning and 155.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 21:20:02,302 INFO L158 Benchmark]: RCFGBuilder took 320.01ms. Allocated memory is still 178.3MB. Free memory was 155.8MB in the beginning and 145.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 21:20:02,303 INFO L158 Benchmark]: IcfgTransformer took 33.37ms. Allocated memory is still 178.3MB. Free memory was 145.0MB in the beginning and 143.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 21:20:02,303 INFO L158 Benchmark]: TraceAbstraction took 9556.77ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 143.2MB in the beginning and 118.6MB in the end (delta: 24.6MB). Peak memory consumption was 61.0MB. Max. memory is 8.0GB. [2022-03-17 21:20:02,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 178.3MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 241.47ms. Allocated memory is still 178.3MB. Free memory was 130.0MB in the beginning and 157.2MB in the end (delta: -27.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.17ms. Allocated memory is still 178.3MB. Free memory was 157.2MB in the beginning and 155.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 320.01ms. Allocated memory is still 178.3MB. Free memory was 155.8MB in the beginning and 145.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 33.37ms. Allocated memory is still 178.3MB. Free memory was 145.0MB in the beginning and 143.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 9556.77ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 143.2MB in the beginning and 118.6MB in the end (delta: 24.6MB). Peak memory consumption was 61.0MB. 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: 13]: 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, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.5s, OverallIterations: 9, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 117 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 83 mSDsluCounter, 1312 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 955 mSDsCounter, 61 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 392 IncrementalHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 61 mSolverCounterUnsat, 357 mSDtfsCounter, 392 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 635 GetRequests, 576 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=8, InterpolantAutomatonStates: 48, 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, 9 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 57 PreInvPairs, 92 NumberOfFragments, 349 HoareAnnotationTreeSize, 57 FomulaSimplifications, 136 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 1691 FormulaSimplificationTreeSizeReductionInter, 3.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 426 NumberOfCodeBlocks, 426 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 635 ConstructedInterpolants, 0 QuantifiedInterpolants, 1676 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1087 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 627/666 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 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (q * x + a + y * s == y * r + b + p * x && a == y * r + p * x) && p * s == q * r + 1 RESULT: Ultimate proved your program to be correct! [2022-03-17 21:20:02,327 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...