/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/loops-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 00:57:19,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 00:57:19,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 00:57:19,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 00:57:19,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 00:57:19,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 00:57:19,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 00:57:19,752 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 00:57:19,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 00:57:19,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 00:57:19,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 00:57:19,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 00:57:19,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 00:57:19,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 00:57:19,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 00:57:19,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 00:57:19,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 00:57:19,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 00:57:19,762 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 00:57:19,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 00:57:19,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 00:57:19,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 00:57:19,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 00:57:19,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 00:57:19,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 00:57:19,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 00:57:19,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:57:19,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 00:57:19,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 00:57:19,763 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 00:57:19,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 00:57:19,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 00:57:19,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 00:57:19,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 00:57:19,964 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 00:57:19,964 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 00:57:19,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2022-04-05 00:57:20,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028ed84d3/2b3c77206ff64ec4ab1d7abb0cc2dba0/FLAG35d8d56c1 [2022-04-05 00:57:20,363 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 00:57:20,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2022-04-05 00:57:20,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028ed84d3/2b3c77206ff64ec4ab1d7abb0cc2dba0/FLAG35d8d56c1 [2022-04-05 00:57:20,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028ed84d3/2b3c77206ff64ec4ab1d7abb0cc2dba0 [2022-04-05 00:57:20,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 00:57:20,383 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 00:57:20,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 00:57:20,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 00:57:20,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 00:57:20,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ec79f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20, skipping insertion in model container [2022-04-05 00:57:20,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 00:57:20,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 00:57:20,522 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c[319,332] [2022-04-05 00:57:20,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:57:20,537 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 00:57:20,544 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c[319,332] [2022-04-05 00:57:20,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:57:20,553 INFO L208 MainTranslator]: Completed translation [2022-04-05 00:57:20,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20 WrapperNode [2022-04-05 00:57:20,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 00:57:20,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 00:57:20,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 00:57:20,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 00:57:20,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 00:57:20,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 00:57:20,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 00:57:20,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 00:57:20,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:57:20,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:57:20,592 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) [2022-04-05 00:57:20,610 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 [2022-04-05 00:57:20,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 00:57:20,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 00:57:20,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 00:57:20,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 00:57:20,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 00:57:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 00:57:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 00:57:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 00:57:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 00:57:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 00:57:20,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 00:57:20,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 00:57:20,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 00:57:20,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 00:57:20,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 00:57:20,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 00:57:20,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 00:57:20,666 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 00:57:20,667 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 00:57:20,786 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 00:57:20,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 00:57:20,790 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 00:57:20,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:57:20 BoogieIcfgContainer [2022-04-05 00:57:20,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 00:57:20,792 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 00:57:20,792 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 00:57:20,793 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 00:57:20,796 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:57:20" (1/1) ... [2022-04-05 00:57:20,797 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 00:57:20,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:57:20 BasicIcfg [2022-04-05 00:57:20,819 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 00:57:20,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 00:57:20,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 00:57:20,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 00:57:20,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 12:57:20" (1/4) ... [2022-04-05 00:57:20,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1103850e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:57:20, skipping insertion in model container [2022-04-05 00:57:20,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:57:20" (2/4) ... [2022-04-05 00:57:20,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1103850e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:57:20, skipping insertion in model container [2022-04-05 00:57:20,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:57:20" (3/4) ... [2022-04-05 00:57:20,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1103850e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 12:57:20, skipping insertion in model container [2022-04-05 00:57:20,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:57:20" (4/4) ... [2022-04-05 00:57:20,840 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.cJordan [2022-04-05 00:57:20,844 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 00:57:20,844 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 00:57:20,884 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 00:57:20,891 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 [2022-04-05 00:57:20,891 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 00:57:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 00:57:20,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 00:57:20,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:57:20,913 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:57:20,914 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:57:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:57:20,918 INFO L85 PathProgramCache]: Analyzing trace with hash 447419557, now seen corresponding path program 1 times [2022-04-05 00:57:20,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:57:20,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168236966] [2022-04-05 00:57:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:57:20,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:57:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:57:21,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:57:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:57:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:57:21,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:57:21,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168236966] [2022-04-05 00:57:21,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168236966] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:57:21,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:57:21,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 00:57:21,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035666399] [2022-04-05 00:57:21,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:57:21,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 00:57:21,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:57:21,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 00:57:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 00:57:21,085 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2022-04-05 00:57:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:57:21,112 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-04-05 00:57:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 00:57:21,114 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 [2022-04-05 00:57:21,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:57:21,121 INFO L225 Difference]: With dead ends: 21 [2022-04-05 00:57:21,121 INFO L226 Difference]: Without dead ends: 14 [2022-04-05 00:57:21,122 INFO L912 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 [2022-04-05 00:57:21,125 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 00:57:21,125 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 00:57:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-05 00:57:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-05 00:57:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:57:21,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-04-05 00:57:21,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-04-05 00:57:21,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:57:21,146 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-04-05 00:57:21,147 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) [2022-04-05 00:57:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-05 00:57:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 00:57:21,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:57:21,148 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:57:21,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 00:57:21,148 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:57:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:57:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash 448343078, now seen corresponding path program 1 times [2022-04-05 00:57:21,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:57:21,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279193704] [2022-04-05 00:57:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:57:21,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:57:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:57:21,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:57:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:57:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:57:21,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:57:21,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279193704] [2022-04-05 00:57:21,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279193704] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:57:21,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:57:21,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 00:57:21,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87371976] [2022-04-05 00:57:21,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:57:21,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 00:57:21,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:57:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 00:57:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 00:57:21,256 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-04-05 00:57:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:57:21,334 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-04-05 00:57:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 00:57:21,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 [2022-04-05 00:57:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:57:21,335 INFO L225 Difference]: With dead ends: 20 [2022-04-05 00:57:21,335 INFO L226 Difference]: Without dead ends: 17 [2022-04-05 00:57:21,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-05 00:57:21,336 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 00:57:21,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 00:57:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-05 00:57:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-05 00:57:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:57:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-05 00:57:21,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-05 00:57:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:57:21,339 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-05 00:57:21,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-04-05 00:57:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-05 00:57:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 00:57:21,340 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:57:21,340 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:57:21,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 00:57:21,340 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:57:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:57:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1890769175, now seen corresponding path program 1 times [2022-04-05 00:57:21,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:57:21,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814561714] [2022-04-05 00:57:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:57:21,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:57:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:57:21,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:57:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:57:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:57:21,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:57:21,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814561714] [2022-04-05 00:57:21,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814561714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:57:21,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:57:21,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 00:57:21,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508798731] [2022-04-05 00:57:21,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:57:21,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 00:57:21,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:57:21,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 00:57:21,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 00:57:21,427 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-04-05 00:57:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:57:21,446 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-04-05 00:57:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 00:57:21,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-04-05 00:57:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:57:21,447 INFO L225 Difference]: With dead ends: 20 [2022-04-05 00:57:21,447 INFO L226 Difference]: Without dead ends: 20 [2022-04-05 00:57:21,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 00:57:21,449 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 00:57:21,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 00:57:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-05 00:57:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-04-05 00:57:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:57:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-05 00:57:21,451 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-04-05 00:57:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:57:21,452 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-05 00:57:21,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-04-05 00:57:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-05 00:57:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 00:57:21,452 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:57:21,452 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:57:21,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 00:57:21,453 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:57:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:57:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1862314917, now seen corresponding path program 1 times [2022-04-05 00:57:21,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:57:21,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166492684] [2022-04-05 00:57:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:57:21,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:57:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:57:21,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:57:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:57:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:57:21,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:57:21,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166492684] [2022-04-05 00:57:21,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166492684] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:57:21,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134097498] [2022-04-05 00:57:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:57:21,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:57:21,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:57:21,525 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) [2022-04-05 00:57:21,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 00:57:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:57:21,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 00:57:21,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:57:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 00:57:21,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:57:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-05 00:57:21,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134097498] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 00:57:21,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-05 00:57:21,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 10 [2022-04-05 00:57:21,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527332029] [2022-04-05 00:57:21,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:57:21,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 00:57:21,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:57:21,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 00:57:21,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-05 00:57:21,725 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:57:21,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:57:21,742 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-04-05 00:57:21,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 00:57:21,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-05 00:57:21,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:57:21,742 INFO L225 Difference]: With dead ends: 17 [2022-04-05 00:57:21,742 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 00:57:21,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-05 00:57:21,745 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 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 [2022-04-05 00:57:21,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 00:57:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 00:57:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 00:57:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 00:57:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 00:57:21,746 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2022-04-05 00:57:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:57:21,746 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 00:57:21,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:57:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 00:57:21,746 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 00:57:21,748 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 00:57:21,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 00:57:21,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:57:21,967 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-04-05 00:57:21,968 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 00:57:21,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 12:57:21 BasicIcfg [2022-04-05 00:57:21,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 00:57:21,980 INFO L158 Benchmark]: Toolchain (without parser) took 1596.94ms. Allocated memory was 191.9MB in the beginning and 238.0MB in the end (delta: 46.1MB). Free memory was 143.1MB in the beginning and 215.9MB in the end (delta: -72.8MB). Peak memory consumption was 51.0MB. Max. memory is 8.0GB. [2022-04-05 00:57:21,980 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 191.9MB. Free memory is still 159.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 00:57:21,980 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.99ms. Allocated memory is still 191.9MB. Free memory was 142.9MB in the beginning and 167.6MB in the end (delta: -24.7MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-04-05 00:57:21,980 INFO L158 Benchmark]: Boogie Preprocessor took 15.73ms. Allocated memory is still 191.9MB. Free memory was 167.6MB in the beginning and 166.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 00:57:21,981 INFO L158 Benchmark]: RCFGBuilder took 221.84ms. Allocated memory is still 191.9MB. Free memory was 166.0MB in the beginning and 156.6MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-05 00:57:21,981 INFO L158 Benchmark]: IcfgTransformer took 26.59ms. Allocated memory is still 191.9MB. Free memory was 156.6MB in the beginning and 155.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 00:57:21,981 INFO L158 Benchmark]: TraceAbstraction took 1159.10ms. Allocated memory was 191.9MB in the beginning and 238.0MB in the end (delta: 46.1MB). Free memory was 155.1MB in the beginning and 215.9MB in the end (delta: -60.8MB). Peak memory consumption was 63.2MB. Max. memory is 8.0GB. [2022-04-05 00:57:21,983 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 191.9MB. Free memory is still 159.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 168.99ms. Allocated memory is still 191.9MB. Free memory was 142.9MB in the beginning and 167.6MB in the end (delta: -24.7MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.73ms. Allocated memory is still 191.9MB. Free memory was 167.6MB in the beginning and 166.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 221.84ms. Allocated memory is still 191.9MB. Free memory was 166.0MB in the beginning and 156.6MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 26.59ms. Allocated memory is still 191.9MB. Free memory was 156.6MB in the beginning and 155.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1159.10ms. Allocated memory was 191.9MB in the beginning and 238.0MB in the end (delta: 46.1MB). Free memory was 155.1MB in the beginning and 215.9MB in the end (delta: -60.8MB). Peak memory consumption was 63.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 4]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 43 mSDsluCounter, 110 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 52 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 57 IncrementalHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 58 mSDtfsCounter, 57 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 18, 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, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 203 SizeOfPredicates, 1 NumberOfNonLiveVariables, 65 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 11/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-05 00:57:22,010 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...