/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/prod4br-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 22:44:28,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 22:44:28,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 22:44:28,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 22:44:28,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 22:44:28,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 22:44:28,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 22:44:28,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 22:44:28,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 22:44:28,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 22:44:28,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 22:44:28,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 22:44:28,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 22:44:28,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 22:44:28,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 22:44:28,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 22:44:28,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 22:44:28,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 22:44:28,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 22:44:28,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 22:44:28,740 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 22:44:28,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 22:44:28,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 22:44:28,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 22:44:28,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 22:44:28,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 22:44:28,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 22:44:28,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 22:44:28,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 22:44:28,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 22:44:28,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-17 22:44:28,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 22:44:28,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 22:44:28,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 22:44:28,759 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 22:44:28,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 22:44:28,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 22:44:28,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 22:44:28,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 22:44:28,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 22:44:28,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 22:44:28,784 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 22:44:28,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 22:44:28,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 22:44:28,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 22:44:28,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 22:44:28,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 22:44:28,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 22:44:28,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 22:44:28,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 22:44:28,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 22:44:28,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 22:44:28,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 22:44:28,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 22:44:28,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:44:28,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 22:44:28,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 22:44:28,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 22:44:28,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 22:44:28,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 22:44:28,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 22:44:28,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 22:44:28,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 22:44:28,789 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 22:44:28,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 22:44:29,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 22:44:29,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 22:44:29,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 22:44:29,027 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 22:44:29,028 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 22:44:29,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2022-03-17 22:44:29,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ceeb2c43/812a3b9496e946c1b373449352b6a57e/FLAG9ca3e3ec1 [2022-03-17 22:44:29,417 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 22:44:29,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2022-03-17 22:44:29,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ceeb2c43/812a3b9496e946c1b373449352b6a57e/FLAG9ca3e3ec1 [2022-03-17 22:44:29,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ceeb2c43/812a3b9496e946c1b373449352b6a57e [2022-03-17 22:44:29,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 22:44:29,826 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 22:44:29,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 22:44:29,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 22:44:29,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 22:44:29,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:44:29" (1/1) ... [2022-03-17 22:44:29,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8a962f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:29, skipping insertion in model container [2022-03-17 22:44:29,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:44:29" (1/1) ... [2022-03-17 22:44:29,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 22:44:29,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 22:44:29,991 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/prod4br-ll_unwindbound5.c[524,537] [2022-03-17 22:44:30,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:44:30,024 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 22:44:30,036 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/prod4br-ll_unwindbound5.c[524,537] [2022-03-17 22:44:30,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:44:30,066 INFO L208 MainTranslator]: Completed translation [2022-03-17 22:44:30,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:30 WrapperNode [2022-03-17 22:44:30,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 22:44:30,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 22:44:30,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 22:44:30,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 22:44:30,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:30" (1/1) ... [2022-03-17 22:44:30,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:30" (1/1) ... [2022-03-17 22:44:30,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:30" (1/1) ... [2022-03-17 22:44:30,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:30" (1/1) ... [2022-03-17 22:44:30,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:30" (1/1) ... [2022-03-17 22:44:30,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:30" (1/1) ... [2022-03-17 22:44:30,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:30" (1/1) ... [2022-03-17 22:44:30,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 22:44:30,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 22:44:30,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 22:44:30,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 22:44:30,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:30" (1/1) ... [2022-03-17 22:44:30,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:44:30,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:30,152 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 22:44:30,167 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 22:44:30,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 22:44:30,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 22:44:30,193 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 22:44:30,193 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 22:44:30,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 22:44:30,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 22:44:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 22:44:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 22:44:30,196 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 22:44:30,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 22:44:30,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 22:44:30,196 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 22:44:30,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 22:44:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 22:44:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 22:44:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 22:44:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 22:44:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 22:44:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 22:44:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 22:44:30,253 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 22:44:30,254 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 22:44:30,393 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 22:44:30,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 22:44:30,400 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 22:44:30,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:44:30 BoogieIcfgContainer [2022-03-17 22:44:30,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 22:44:30,402 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 22:44:30,402 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 22:44:30,406 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 22:44:30,409 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:44:30" (1/1) ... [2022-03-17 22:44:30,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:44:30 BasicIcfg [2022-03-17 22:44:30,436 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 22:44:30,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 22:44:30,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 22:44:30,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 22:44:30,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 10:44:29" (1/4) ... [2022-03-17 22:44:30,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363b21b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:44:30, skipping insertion in model container [2022-03-17 22:44:30,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:30" (2/4) ... [2022-03-17 22:44:30,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363b21b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:44:30, skipping insertion in model container [2022-03-17 22:44:30,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:44:30" (3/4) ... [2022-03-17 22:44:30,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363b21b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 10:44:30, skipping insertion in model container [2022-03-17 22:44:30,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:44:30" (4/4) ... [2022-03-17 22:44:30,452 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound5.cqvasr [2022-03-17 22:44:30,455 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 22:44:30,455 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 22:44:30,528 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 22:44:30,535 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 22:44:30,536 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 22:44:30,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 22:44:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 22:44:30,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:30,564 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:30,564 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:30,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2022-03-17 22:44:30,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:30,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445510750] [2022-03-17 22:44:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:30,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:30,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 22:44:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:30,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 22:44:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:44:30,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:30,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445510750] [2022-03-17 22:44:30,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445510750] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:44:30,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:44:30,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 22:44:30,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751925750] [2022-03-17 22:44:30,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:44:30,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 22:44:30,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 22:44:30,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 22:44:30,814 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 22:44:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:30,888 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-03-17 22:44:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 22:44:30,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 22:44:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:30,900 INFO L225 Difference]: With dead ends: 56 [2022-03-17 22:44:30,900 INFO L226 Difference]: Without dead ends: 28 [2022-03-17 22:44:30,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 22:44:30,906 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:30,907 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:44:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-17 22:44:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-17 22:44:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 22:44:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-03-17 22:44:30,941 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-03-17 22:44:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:30,941 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-03-17 22:44:30,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 22:44:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-03-17 22:44:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 22:44:30,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:30,943 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:30,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 22:44:30,944 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:30,945 INFO L85 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2022-03-17 22:44:30,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:30,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260658518] [2022-03-17 22:44:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:30,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:30,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:30,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90332753] [2022-03-17 22:44:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:30,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:30,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:30,968 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 22:44:31,002 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 22:44:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:31,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 22:44:31,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:44:31,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:44:31,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260658518] [2022-03-17 22:44:31,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90332753] [2022-03-17 22:44:31,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90332753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:44:31,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:44:31,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 22:44:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167805528] [2022-03-17 22:44:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:44:31,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 22:44:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 22:44:31,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 22:44:31,171 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 22:44:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:31,193 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-03-17 22:44:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 22:44:31,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-17 22:44:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:31,200 INFO L225 Difference]: With dead ends: 37 [2022-03-17 22:44:31,200 INFO L226 Difference]: Without dead ends: 29 [2022-03-17 22:44:31,201 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 22:44:31,202 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:31,202 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:44:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-17 22:44:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-17 22:44:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 22:44:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-03-17 22:44:31,215 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-03-17 22:44:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:31,215 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-03-17 22:44:31,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 22:44:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-03-17 22:44:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 22:44:31,217 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:31,217 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:31,242 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 22:44:31,432 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 22:44:31,433 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:31,434 INFO L85 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2022-03-17 22:44:31,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:31,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160320242] [2022-03-17 22:44:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:31,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:31,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:31,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305505947] [2022-03-17 22:44:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:31,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:31,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:31,457 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 22:44:31,460 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 22:44:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:31,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 22:44:31,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:44:31,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:44:31,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:31,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160320242] [2022-03-17 22:44:31,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:31,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305505947] [2022-03-17 22:44:31,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305505947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:44:31,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:44:31,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 22:44:31,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458848435] [2022-03-17 22:44:31,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:44:31,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 22:44:31,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 22:44:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 22:44:31,633 INFO L87 Difference]: Start difference. First operand 29 states and 35 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 22:44:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:31,709 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-03-17 22:44:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 22:44:31,710 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-17 22:44:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:31,711 INFO L225 Difference]: With dead ends: 42 [2022-03-17 22:44:31,711 INFO L226 Difference]: Without dead ends: 40 [2022-03-17 22:44:31,711 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 22:44:31,712 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:31,716 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:44:31,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-17 22:44:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-03-17 22:44:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 22:44:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-03-17 22:44:31,724 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2022-03-17 22:44:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:31,724 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-03-17 22:44:31,724 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 22:44:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-03-17 22:44:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 22:44:31,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:31,725 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:31,751 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 22:44:31,951 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 22:44:31,951 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2022-03-17 22:44:31,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:31,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295238291] [2022-03-17 22:44:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:31,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:31,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:31,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957301857] [2022-03-17 22:44:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:31,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:31,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:31,971 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 22:44:31,973 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 22:44:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 22:44:32,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:44:32,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:44:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:44:32,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295238291] [2022-03-17 22:44:32,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957301857] [2022-03-17 22:44:32,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957301857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:44:32,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:44:32,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-17 22:44:32,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825538447] [2022-03-17 22:44:32,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:44:32,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-17 22:44:32,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-17 22:44:32,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-17 22:44:32,639 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 22:44:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:32,976 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-03-17 22:44:32,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 22:44:32,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2022-03-17 22:44:32,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:32,979 INFO L225 Difference]: With dead ends: 55 [2022-03-17 22:44:32,979 INFO L226 Difference]: Without dead ends: 53 [2022-03-17 22:44:32,979 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-17 22:44:32,980 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:32,980 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 173 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 22:44:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-17 22:44:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-03-17 22:44:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 22:44:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-03-17 22:44:32,988 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2022-03-17 22:44:32,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:32,988 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-03-17 22:44:32,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 22:44:32,988 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-03-17 22:44:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 22:44:32,989 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:32,989 INFO L500 BasicCegarLoop]: trace histogram [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 22:44:33,014 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 22:44:33,211 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 22:44:33,212 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:33,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2022-03-17 22:44:33,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:33,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17601729] [2022-03-17 22:44:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:33,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:33,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:33,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730531023] [2022-03-17 22:44:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:33,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:33,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:33,225 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 22:44:33,227 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 22:44:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:33,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 22:44:33,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:44:33,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:44:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:44:33,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:33,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17601729] [2022-03-17 22:44:33,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730531023] [2022-03-17 22:44:33,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730531023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:44:33,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:44:33,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 22:44:33,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952032028] [2022-03-17 22:44:33,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:44:33,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 22:44:33,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 22:44:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 22:44:33,405 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-17 22:44:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:33,466 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2022-03-17 22:44:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 22:44:33,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-03-17 22:44:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:33,467 INFO L225 Difference]: With dead ends: 103 [2022-03-17 22:44:33,468 INFO L226 Difference]: Without dead ends: 93 [2022-03-17 22:44:33,468 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 22:44:33,469 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:33,469 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 144 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:44:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-17 22:44:33,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-03-17 22:44:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 64 states have internal predecessors, (80), 16 states have call successors, (16), 12 states have call predecessors, (16), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 22:44:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-03-17 22:44:33,481 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 27 [2022-03-17 22:44:33,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:33,481 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-03-17 22:44:33,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-17 22:44:33,481 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2022-03-17 22:44:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 22:44:33,482 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:33,482 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:33,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-17 22:44:33,699 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 22:44:33,699 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2116787731, now seen corresponding path program 1 times [2022-03-17 22:44:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:33,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101370527] [2022-03-17 22:44:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:33,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:33,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:33,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330314554] [2022-03-17 22:44:33,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:33,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:33,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:33,712 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 22:44:33,727 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 22:44:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-17 22:44:33,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:44:36,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:44:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:44:37,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:37,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101370527] [2022-03-17 22:44:37,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:37,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330314554] [2022-03-17 22:44:37,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330314554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:44:37,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:44:37,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2022-03-17 22:44:37,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853694279] [2022-03-17 22:44:37,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:44:37,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 22:44:37,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 22:44:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-17 22:44:37,972 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 22:44:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:39,584 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2022-03-17 22:44:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 22:44:39,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-03-17 22:44:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:39,589 INFO L225 Difference]: With dead ends: 127 [2022-03-17 22:44:39,589 INFO L226 Difference]: Without dead ends: 121 [2022-03-17 22:44:39,589 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-17 22:44:39,590 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:39,590 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 246 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-17 22:44:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-17 22:44:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2022-03-17 22:44:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 59 states have internal predecessors, (75), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 22:44:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-03-17 22:44:39,605 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 27 [2022-03-17 22:44:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:39,605 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-03-17 22:44:39,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 22:44:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-03-17 22:44:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 22:44:39,606 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:39,606 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:39,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-17 22:44:39,831 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 22:44:39,831 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash -410392694, now seen corresponding path program 1 times [2022-03-17 22:44:39,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:39,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004991262] [2022-03-17 22:44:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:39,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:39,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:39,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984569384] [2022-03-17 22:44:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:39,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:39,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:39,852 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 22:44:39,852 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 22:44:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:39,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 22:44:39,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 22:44:39,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:44:39,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:39,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004991262] [2022-03-17 22:44:39,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984569384] [2022-03-17 22:44:39,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984569384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:44:39,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:44:39,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-17 22:44:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668004503] [2022-03-17 22:44:39,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:44:39,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 22:44:39,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 22:44:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-17 22:44:39,970 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 22:44:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:40,075 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2022-03-17 22:44:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 22:44:40,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-03-17 22:44:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:40,077 INFO L225 Difference]: With dead ends: 116 [2022-03-17 22:44:40,077 INFO L226 Difference]: Without dead ends: 104 [2022-03-17 22:44:40,078 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-17 22:44:40,078 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:40,079 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 176 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:44:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-17 22:44:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-03-17 22:44:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 76 states have internal predecessors, (98), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 22:44:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2022-03-17 22:44:40,095 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 29 [2022-03-17 22:44:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:40,095 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2022-03-17 22:44:40,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 22:44:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2022-03-17 22:44:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-17 22:44:40,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:40,096 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:40,119 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 22:44:40,311 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 22:44:40,311 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:40,312 INFO L85 PathProgramCache]: Analyzing trace with hash 159893073, now seen corresponding path program 1 times [2022-03-17 22:44:40,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:40,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144894957] [2022-03-17 22:44:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:40,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:40,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:40,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590804616] [2022-03-17 22:44:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:40,335 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 22:44:40,336 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 22:44:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:40,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 22:44:40,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:44:40,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:44:40,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144894957] [2022-03-17 22:44:40,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590804616] [2022-03-17 22:44:40,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590804616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:44:40,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:44:40,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 22:44:40,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504296300] [2022-03-17 22:44:40,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:44:40,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 22:44:40,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 22:44:40,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-17 22:44:40,464 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 22:44:40,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:40,527 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2022-03-17 22:44:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 22:44:40,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-03-17 22:44:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:40,530 INFO L225 Difference]: With dead ends: 141 [2022-03-17 22:44:40,530 INFO L226 Difference]: Without dead ends: 129 [2022-03-17 22:44:40,530 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-17 22:44:40,531 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:40,531 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 152 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:44:40,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-17 22:44:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2022-03-17 22:44:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 87 states have internal predecessors, (110), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 22:44:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2022-03-17 22:44:40,564 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 40 [2022-03-17 22:44:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:40,565 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2022-03-17 22:44:40,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 22:44:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2022-03-17 22:44:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-17 22:44:40,566 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:40,566 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:40,590 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 22:44:40,766 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 22:44:40,767 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash -837179280, now seen corresponding path program 1 times [2022-03-17 22:44:40,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:40,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172491799] [2022-03-17 22:44:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:40,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:40,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637629413] [2022-03-17 22:44:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:40,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:40,777 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 22:44:40,803 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 22:44:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 22:44:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:40,949 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 22:44:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:44:40,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:44:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 22:44:41,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:41,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172491799] [2022-03-17 22:44:41,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:41,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637629413] [2022-03-17 22:44:41,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637629413] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 22:44:41,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:44:41,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-17 22:44:41,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832370355] [2022-03-17 22:44:41,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:44:41,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 22:44:41,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 22:44:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-17 22:44:41,064 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 22:44:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:41,226 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2022-03-17 22:44:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 22:44:41,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-03-17 22:44:41,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:41,228 INFO L225 Difference]: With dead ends: 120 [2022-03-17 22:44:41,228 INFO L226 Difference]: Without dead ends: 100 [2022-03-17 22:44:41,228 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-17 22:44:41,229 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:41,229 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:44:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-17 22:44:41,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2022-03-17 22:44:41,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 22:44:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-03-17 22:44:41,237 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 40 [2022-03-17 22:44:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:41,238 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-03-17 22:44:41,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 22:44:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-03-17 22:44:41,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-17 22:44:41,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:41,239 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:41,266 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 22:44:41,460 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 22:44:41,461 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:41,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1169624165, now seen corresponding path program 2 times [2022-03-17 22:44:41,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:41,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543755959] [2022-03-17 22:44:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:41,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:41,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:41,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524652125] [2022-03-17 22:44:41,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 22:44:41,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:41,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:41,474 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:44:41,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 22:44:41,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 22:44:41,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:44:41,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 22:44:41,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:44:41,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:44:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 22:44:41,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:41,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543755959] [2022-03-17 22:44:41,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:41,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524652125] [2022-03-17 22:44:41,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524652125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:44:41,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:44:41,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-17 22:44:41,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030204654] [2022-03-17 22:44:41,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:44:41,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 22:44:41,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:41,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 22:44:41,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 22:44:41,761 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-17 22:44:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:41,828 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-03-17 22:44:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 22:44:41,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2022-03-17 22:44:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:41,833 INFO L225 Difference]: With dead ends: 85 [2022-03-17 22:44:41,833 INFO L226 Difference]: Without dead ends: 77 [2022-03-17 22:44:41,834 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-17 22:44:41,835 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 37 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:41,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 142 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:44:41,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-17 22:44:41,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-17 22:44:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.293103448275862) internal successors, (75), 59 states have internal predecessors, (75), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 22:44:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2022-03-17 22:44:41,848 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 54 [2022-03-17 22:44:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:41,848 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2022-03-17 22:44:41,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-17 22:44:41,849 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2022-03-17 22:44:41,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-17 22:44:41,853 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:41,853 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:41,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 22:44:42,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 22:44:42,066 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:42,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:42,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1678730126, now seen corresponding path program 3 times [2022-03-17 22:44:42,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:42,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515543262] [2022-03-17 22:44:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:42,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:42,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:42,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896653233] [2022-03-17 22:44:42,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 22:44:42,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:42,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:42,077 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:44:42,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 22:44:42,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-17 22:44:42,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-17 22:44:42,165 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 22:44:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 22:44:42,265 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 22:44:42,265 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 22:44:42,266 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 22:44:42,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 22:44:42,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 22:44:42,470 INFO L718 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:42,473 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 22:44:42,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 10:44:42 BasicIcfg [2022-03-17 22:44:42,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 22:44:42,513 INFO L158 Benchmark]: Toolchain (without parser) took 12687.68ms. Allocated memory was 201.3MB in the beginning and 293.6MB in the end (delta: 92.3MB). Free memory was 148.0MB in the beginning and 207.1MB in the end (delta: -59.0MB). Peak memory consumption was 33.9MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,514 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 201.3MB. Free memory is still 163.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 22:44:42,514 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.92ms. Allocated memory was 201.3MB in the beginning and 293.6MB in the end (delta: 92.3MB). Free memory was 147.9MB in the beginning and 267.7MB in the end (delta: -119.9MB). Peak memory consumption was 12.2MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,514 INFO L158 Benchmark]: Boogie Preprocessor took 39.46ms. Allocated memory is still 293.6MB. Free memory was 267.7MB in the beginning and 266.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,514 INFO L158 Benchmark]: RCFGBuilder took 280.09ms. Allocated memory is still 293.6MB. Free memory was 266.2MB in the beginning and 254.1MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,515 INFO L158 Benchmark]: IcfgTransformer took 33.74ms. Allocated memory is still 293.6MB. Free memory was 254.1MB in the beginning and 253.1MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,515 INFO L158 Benchmark]: TraceAbstraction took 12075.54ms. Allocated memory is still 293.6MB. Free memory was 252.5MB in the beginning and 207.1MB in the end (delta: 45.4MB). Peak memory consumption was 46.0MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 201.3MB. Free memory is still 163.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 249.92ms. Allocated memory was 201.3MB in the beginning and 293.6MB in the end (delta: 92.3MB). Free memory was 147.9MB in the beginning and 267.7MB in the end (delta: -119.9MB). Peak memory consumption was 12.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.46ms. Allocated memory is still 293.6MB. Free memory was 267.7MB in the beginning and 266.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 280.09ms. Allocated memory is still 293.6MB. Free memory was 266.2MB in the beginning and 254.1MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 33.74ms. Allocated memory is still 293.6MB. Free memory was 254.1MB in the beginning and 253.1MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 12075.54ms. Allocated memory is still 293.6MB. Free memory was 252.5MB in the beginning and 207.1MB in the end (delta: 45.4MB). Peak memory consumption was 46.0MB. 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=10, counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L26] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=32, y=64] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [\old(counter)=0, a=32, b=64, counter=0, p=1, q=0, x=32, y=64] [L33] EXPR counter++ VAL [\old(counter)=0, a=32, b=64, counter=1, counter++=0, p=1, q=0, x=32, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=32, b=64, counter=1, p=1, q=0, x=32, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [\old(counter)=0, a=32, b=64, counter=1, p=1, q=0, x=32, y=64] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=16, b=32, counter=1, p=4, q=0, x=32, y=64] [L33] EXPR counter++ VAL [\old(counter)=0, a=16, b=32, counter=2, counter++=1, p=4, q=0, x=32, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=16, b=32, counter=2, p=4, q=0, x=32, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [\old(counter)=0, a=16, b=32, counter=2, p=4, q=0, x=32, y=64] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=8, b=16, counter=2, p=16, q=0, x=32, y=64] [L33] EXPR counter++ VAL [\old(counter)=0, a=8, b=16, counter=3, counter++=2, p=16, q=0, x=32, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=8, b=16, counter=3, p=16, q=0, x=32, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [\old(counter)=0, a=8, b=16, counter=3, p=16, q=0, x=32, y=64] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=4, b=8, counter=3, p=64, q=0, x=32, y=64] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=8, counter=4, counter++=3, p=64, q=0, x=32, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=4, b=8, counter=4, p=64, q=0, x=32, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [\old(counter)=0, a=4, b=8, counter=4, p=64, q=0, x=32, y=64] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=2, b=4, counter=4, p=256, q=0, x=32, y=64] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, b=4, counter=5, counter++=4, p=256, q=0, x=32, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=2, b=4, counter=5, p=256, q=0, x=32, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [\old(counter)=0, a=2, b=4, counter=5, p=256, q=0, x=32, y=64] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=1, b=2, counter=5, p=1024, q=0, x=32, y=64] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, counter=6, counter++=5, p=1024, q=0, x=32, y=64] [L33] COND FALSE !(counter++<5) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.9s, OverallIterations: 11, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 281 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 269 mSDsluCounter, 1370 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1064 mSDsCounter, 137 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 863 IncrementalHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 137 mSolverCounterUnsat, 306 mSDtfsCounter, 863 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 472 GetRequests, 378 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=8, InterpolantAutomatonStates: 81, 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, 10 MinimizatonAttempts, 124 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 357 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 451 ConstructedInterpolants, 0 QuantifiedInterpolants, 1534 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1048 ConjunctsInSsa, 116 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 118/236 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 RESULT: Ultimate proved your program to be incorrect! [2022-03-17 22:44:42,532 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...