/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench/freire2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:55:35,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:55:35,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:55:35,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 15:55:35,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 15:55:35,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 15:55:35,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 15:55:35,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 15:55:35,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 15:55:35,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 15:55:35,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 15:55:35,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 15:55:35,651 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 15:55:35,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 15:55:35,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 15:55:35,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 15:55:35,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 15:55:35,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 15:55:35,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:55:35,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:55:35,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:55:35,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:55:35,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:55:35,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:55:35,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:55:35,682 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:55:35,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:55:35,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:55:35,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:55:35,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:55:35,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:55:35,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:55:35,688 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:55:35,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:55:35,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:55:35,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:55:35,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:55:35,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:55:35,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:55:35,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:55:35,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:55:35,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:55:35,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:55:35,690 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:55:35,690 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:55:35,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:55:35,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:55:35,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:55:35,888 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:55:35,889 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:55:35,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/freire2.c [2022-03-17 15:55:35,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b975ec266/ba3d19cde0a24794bbef7cd4b3375e55/FLAG6ce232176 [2022-03-17 15:55:36,315 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:55:36,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/freire2.c [2022-03-17 15:55:36,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b975ec266/ba3d19cde0a24794bbef7cd4b3375e55/FLAG6ce232176 [2022-03-17 15:55:36,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b975ec266/ba3d19cde0a24794bbef7cd4b3375e55 [2022-03-17 15:55:36,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:55:36,336 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:55:36,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:55:36,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:55:36,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:55:36,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d682088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36, skipping insertion in model container [2022-03-17 15:55:36,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:55:36,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:55:36,534 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/freire2.c[709,722] [2022-03-17 15:55:36,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:55:36,574 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:55:36,582 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/freire2.c[709,722] [2022-03-17 15:55:36,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:55:36,608 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:55:36,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36 WrapperNode [2022-03-17 15:55:36,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:55:36,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:55:36,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:55:36,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:55:36,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:55:36,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:55:36,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:55:36,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:55:36,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:55:36,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:55:36,705 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 15:55:36,733 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 15:55:36,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:55:36,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:55:36,745 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:55:36,745 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 15:55:36,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:55:36,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:55:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:55:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:55:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:55:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:55:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-03-17 15:55:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 15:55:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:55:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:55:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:55:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:55:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:55:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:55:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:55:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:55:36,797 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:55:36,798 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:55:36,924 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:55:36,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:55:36,935 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 15:55:36,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:55:36 BoogieIcfgContainer [2022-03-17 15:55:36,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:55:36,937 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:55:36,937 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:55:36,938 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:55:36,940 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:55:36" (1/1) ... [2022-03-17 15:55:36,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:55:36 BasicIcfg [2022-03-17 15:55:36,970 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:55:36,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:55:36,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:55:36,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:55:36,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:55:36" (1/4) ... [2022-03-17 15:55:36,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad4ab9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:55:36, skipping insertion in model container [2022-03-17 15:55:36,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:55:36" (2/4) ... [2022-03-17 15:55:36,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad4ab9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:55:36, skipping insertion in model container [2022-03-17 15:55:36,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:55:36" (3/4) ... [2022-03-17 15:55:36,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad4ab9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:55:36, skipping insertion in model container [2022-03-17 15:55:36,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:55:36" (4/4) ... [2022-03-17 15:55:36,975 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2.cJordan [2022-03-17 15:55:36,978 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:55:36,978 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:55:37,017 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:55:37,022 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 15:55:37,022 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:55:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 15:55:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:55:37,037 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:55:37,038 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:55:37,038 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:55:37,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:55:37,043 INFO L85 PathProgramCache]: Analyzing trace with hash 637070135, now seen corresponding path program 1 times [2022-03-17 15:55:37,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:55:37,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417488808] [2022-03-17 15:55:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:55:37,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:55:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:55:37,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:55:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:55:37,199 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 15:55:37,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:55:37,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417488808] [2022-03-17 15:55:37,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417488808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:55:37,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:55:37,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:55:37,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295640828] [2022-03-17 15:55:37,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:55:37,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:55:37,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:55:37,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:55:37,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:55:37,229 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:55:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:55:37,304 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-03-17 15:55:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:55:37,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 15:55:37,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:55:37,312 INFO L225 Difference]: With dead ends: 25 [2022-03-17 15:55:37,312 INFO L226 Difference]: Without dead ends: 20 [2022-03-17 15:55:37,316 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:55:37,320 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:55:37,321 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:55:37,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-17 15:55:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-17 15:55:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 15:55:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-03-17 15:55:37,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2022-03-17 15:55:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:55:37,350 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-03-17 15:55:37,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:55:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-03-17 15:55:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:55:37,352 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:55:37,352 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:55:37,352 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:55:37,352 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:55:37,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:55:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash 638946968, now seen corresponding path program 1 times [2022-03-17 15:55:37,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:55:37,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107744448] [2022-03-17 15:55:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:55:37,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:55:37,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:55:37,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090115373] [2022-03-17 15:55:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:55:37,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:55:37,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:55:37,394 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 15:55:37,411 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 15:55:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 15:55:37,443 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 15:55:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 15:55:37,470 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 15:55:37,471 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 15:55:37,472 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 15:55:37,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 15:55:37,683 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 15:55:37,686 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1] [2022-03-17 15:55:37,688 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 15:55:37,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:55:37 BasicIcfg [2022-03-17 15:55:37,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 15:55:37,699 INFO L158 Benchmark]: Toolchain (without parser) took 1362.77ms. Allocated memory is still 184.5MB. Free memory was 128.8MB in the beginning and 113.4MB in the end (delta: 15.4MB). Peak memory consumption was 13.7MB. Max. memory is 8.0GB. [2022-03-17 15:55:37,699 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 184.5MB. Free memory is still 145.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 15:55:37,700 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.80ms. Allocated memory is still 184.5MB. Free memory was 128.6MB in the beginning and 154.8MB in the end (delta: -26.2MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. [2022-03-17 15:55:37,700 INFO L158 Benchmark]: Boogie Preprocessor took 44.66ms. Allocated memory is still 184.5MB. Free memory was 154.8MB in the beginning and 153.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:55:37,700 INFO L158 Benchmark]: RCFGBuilder took 282.76ms. Allocated memory is still 184.5MB. Free memory was 153.2MB in the beginning and 142.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 15:55:37,701 INFO L158 Benchmark]: IcfgTransformer took 33.21ms. Allocated memory is still 184.5MB. Free memory was 142.8MB in the beginning and 141.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 15:55:37,701 INFO L158 Benchmark]: TraceAbstraction took 727.22ms. Allocated memory is still 184.5MB. Free memory was 140.7MB in the beginning and 113.4MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-03-17 15:55:37,703 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 184.5MB. Free memory is still 145.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 268.80ms. Allocated memory is still 184.5MB. Free memory was 128.6MB in the beginning and 154.8MB in the end (delta: -26.2MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.66ms. Allocated memory is still 184.5MB. Free memory was 154.8MB in the beginning and 153.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 282.76ms. Allocated memory is still 184.5MB. Free memory was 153.2MB in the beginning and 142.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 33.21ms. Allocated memory is still 184.5MB. Free memory was 142.8MB in the beginning and 141.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 727.22ms. Allocated memory is still 184.5MB. Free memory was 140.7MB in the beginning and 113.4MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. 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 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] x = a [L29] s = 3.25 [L30] r = 1 VAL [a=2, r=1, s=13/4, x=2] [L32] COND TRUE 1 VAL [a=2, r=1, s=13/4, x=2] [L33] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 27 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8 IncrementalHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 24 mSDtfsCounter, 8 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces [2022-03-17 15:55:37,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...