/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 18:16:59,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 18:16:59,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 18:16:59,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 18:16:59,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 18:16:59,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 18:16:59,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 18:16:59,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 18:16:59,470 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 18:16:59,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 18:16:59,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 18:16:59,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 18:16:59,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 18:16:59,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 18:16:59,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 18:16:59,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 18:16:59,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 18:16:59,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 18:16:59,472 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 18:16:59,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 18:16:59,473 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 18:16:59,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 18:16:59,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 18:16:59,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 18:16:59,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 18:16:59,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 18:16:59,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:16:59,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 18:16:59,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 18:16:59,474 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 18:16:59,474 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 18:16:59,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 18:16:59,474 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 18:16:59,474 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 18:16:59,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 18:16:59,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 18:16:59,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 18:16:59,694 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 18:16:59,695 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 18:16:59,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound10.c [2022-04-06 18:16:59,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a732d27c2/438018a34c784745a0f6d1b4e9a2c11a/FLAGee5bd80b0 [2022-04-06 18:17:00,117 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 18:17:00,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound10.c [2022-04-06 18:17:00,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a732d27c2/438018a34c784745a0f6d1b4e9a2c11a/FLAGee5bd80b0 [2022-04-06 18:17:00,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a732d27c2/438018a34c784745a0f6d1b4e9a2c11a [2022-04-06 18:17:00,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 18:17:00,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 18:17:00,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 18:17:00,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 18:17:00,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 18:17:00,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:17:00" (1/1) ... [2022-04-06 18:17:00,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1303c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00, skipping insertion in model container [2022-04-06 18:17:00,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:17:00" (1/1) ... [2022-04-06 18:17:00,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 18:17:00,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 18:17:00,731 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound10.c[454,467] [2022-04-06 18:17:00,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:17:00,745 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 18:17:00,752 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound10.c[454,467] [2022-04-06 18:17:00,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:17:00,782 INFO L208 MainTranslator]: Completed translation [2022-04-06 18:17:00,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00 WrapperNode [2022-04-06 18:17:00,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 18:17:00,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 18:17:00,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 18:17:00,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 18:17:00,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00" (1/1) ... [2022-04-06 18:17:00,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00" (1/1) ... [2022-04-06 18:17:00,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00" (1/1) ... [2022-04-06 18:17:00,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00" (1/1) ... [2022-04-06 18:17:00,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00" (1/1) ... [2022-04-06 18:17:00,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00" (1/1) ... [2022-04-06 18:17:00,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00" (1/1) ... [2022-04-06 18:17:00,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 18:17:00,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 18:17:00,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 18:17:00,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 18:17:00,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00" (1/1) ... [2022-04-06 18:17:00,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:17:00,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:17:00,848 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) [2022-04-06 18:17:00,849 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 [2022-04-06 18:17:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 18:17:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 18:17:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 18:17:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 18:17:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 18:17:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 18:17:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 18:17:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 18:17:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 18:17:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 18:17:00,930 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 18:17:00,931 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 18:17:00,998 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 18:17:01,002 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 18:17:01,002 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 18:17:01,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:17:01 BoogieIcfgContainer [2022-04-06 18:17:01,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 18:17:01,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 18:17:01,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 18:17:01,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 18:17:01,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:17:00" (1/3) ... [2022-04-06 18:17:01,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdccc62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:17:01, skipping insertion in model container [2022-04-06 18:17:01,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:17:00" (2/3) ... [2022-04-06 18:17:01,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdccc62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:17:01, skipping insertion in model container [2022-04-06 18:17:01,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:17:01" (3/3) ... [2022-04-06 18:17:01,018 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound10.c [2022-04-06 18:17:01,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 18:17:01,027 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 18:17:01,071 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 18:17:01,077 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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 [2022-04-06 18:17:01,077 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 18:17:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 18:17:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 18:17:01,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:17:01,099 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:17:01,099 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:17:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:17:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1914087080, now seen corresponding path program 1 times [2022-04-06 18:17:01,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:17:01,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094580990] [2022-04-06 18:17:01,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:17:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1914087080, now seen corresponding path program 2 times [2022-04-06 18:17:01,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:17:01,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559023547] [2022-04-06 18:17:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:17:01,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:17:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:17:01,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:17:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:17:01,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:17:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:17:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:17:01,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:17:01,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559023547] [2022-04-06 18:17:01,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559023547] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:17:01,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:17:01,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:17:01,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:17:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094580990] [2022-04-06 18:17:01,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094580990] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:17:01,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:17:01,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:17:01,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142431015] [2022-04-06 18:17:01,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:17:01,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 18:17:01,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:17:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 18:17:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 18:17:01,278 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:17:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:17:01,337 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-04-06 18:17:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 18:17:01,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 18:17:01,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:17:01,343 INFO L225 Difference]: With dead ends: 45 [2022-04-06 18:17:01,343 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 18:17:01,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 18:17:01,348 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:17:01,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:17:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 18:17:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 18:17:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 18:17:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-04-06 18:17:01,377 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-04-06 18:17:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:17:01,377 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-04-06 18:17:01,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:17:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-04-06 18:17:01,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 18:17:01,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:17:01,378 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:17:01,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 18:17:01,378 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:17:01,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:17:01,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1699034386, now seen corresponding path program 1 times [2022-04-06 18:17:01,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:17:01,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1829301800] [2022-04-06 18:17:01,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:17:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1699034386, now seen corresponding path program 2 times [2022-04-06 18:17:01,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:17:01,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073456666] [2022-04-06 18:17:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:17:01,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:17:01,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:17:01,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481291983] [2022-04-06 18:17:01,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:17:01,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:17:01,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:17:01,396 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) [2022-04-06 18:17:01,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 18:17:01,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:17:01,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:17:01,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 18:17:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:17:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:17:01,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:17:01,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:17:01,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073456666] [2022-04-06 18:17:01,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:17:01,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481291983] [2022-04-06 18:17:01,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481291983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:17:01,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:17:01,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:17:01,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:17:01,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1829301800] [2022-04-06 18:17:01,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1829301800] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:17:01,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:17:01,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:17:01,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512094384] [2022-04-06 18:17:01,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:17:01,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:17:01,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:17:01,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:17:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:17:01,576 INFO L87 Difference]: Start difference. First operand 22 states and 23 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:17:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:17:01,627 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-04-06 18:17:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:17:01,627 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 18:17:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:17:01,628 INFO L225 Difference]: With dead ends: 32 [2022-04-06 18:17:01,628 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 18:17:01,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:17:01,629 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:17:01,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:17:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 18:17:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 18:17:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 18:17:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-04-06 18:17:01,636 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2022-04-06 18:17:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:17:01,636 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-04-06 18:17:01,636 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:17:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-04-06 18:17:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 18:17:01,637 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:17:01,637 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:17:01,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 18:17:01,847 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 [2022-04-06 18:17:01,848 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:17:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:17:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash 276758134, now seen corresponding path program 1 times [2022-04-06 18:17:01,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:17:01,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [380428006] [2022-04-06 18:17:02,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 18:17:02,304 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 18:17:02,310 INFO L85 PathProgramCache]: Analyzing trace with hash 22480176, now seen corresponding path program 1 times [2022-04-06 18:17:02,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:17:02,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028177781] [2022-04-06 18:17:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:17:02,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:17:02,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:17:02,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476352109] [2022-04-06 18:17:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:17:02,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:17:02,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:17:02,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:17:02,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 18:17:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:17:02,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 18:17:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:17:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:17:02,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:17:02,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:17:02,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028177781] [2022-04-06 18:17:02,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:17:02,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476352109] [2022-04-06 18:17:02,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476352109] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:17:02,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:17:02,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:17:10,981 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_main_~c~0_BEFORE_RETURN_1 Int) (v_main_~y~0_15 Int) (v_main_~k~0_BEFORE_RETURN_1 Int) (v_main_~x~0_15 Int) (v___VERIFIER_assert_~cond_BEFORE_RETURN_1 Int)) (let ((.cse2 (= v___VERIFIER_assert_~cond_BEFORE_RETURN_1 1)) (.cse0 (= v___VERIFIER_assert_~cond_BEFORE_RETURN_1 0))) (and (let ((.cse1 (= (+ (* (- 2) c_main_~x~0) c_main_~y~0 (* c_main_~y~0 c_main_~y~0)) 0))) (or (and .cse0 (not .cse1)) (and .cse2 .cse1))) (let ((.cse4 (* (- 1) v_main_~c~0_BEFORE_RETURN_1))) (or (let ((.cse3 (div .cse4 (- 2)))) (and (= (* 2 .cse3) v_main_~y~0_15) (< 0 .cse3) (= v_main_~x~0_15 (+ (* 2 (* .cse3 .cse3)) .cse3)) (< .cse3 (+ (div (+ v_main_~k~0_BEFORE_RETURN_1 (- 2)) 2) 2)) (= (mod v_main_~c~0_BEFORE_RETURN_1 2) 0))) (let ((.cse5 (div (+ .cse4 1) (- 2)))) (and (= v_main_~y~0_15 (+ (* .cse5 2) 1)) (< .cse5 (+ (div (+ (- 1) v_main_~k~0_BEFORE_RETURN_1) 2) 1)) (= v_main_~x~0_15 (+ (* .cse5 3) (* 2 (* .cse5 .cse5)) 1)) (<= 0 .cse5) (= (mod (+ v_main_~c~0_BEFORE_RETURN_1 1) 2) 0))) (and (= v_main_~x~0_15 0) (= v_main_~y~0_15 0) (= v_main_~c~0_BEFORE_RETURN_1 0)))) (let ((.cse6 (= (+ v_main_~y~0_15 (* v_main_~y~0_15 v_main_~y~0_15) (* v_main_~x~0_15 (- 2))) 0))) (or (and .cse2 .cse6) (and .cse0 (not .cse6))))))) is different from true [2022-04-06 18:17:11,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:17:11,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [380428006] [2022-04-06 18:17:11,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [380428006] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:17:11,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:17:11,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:17:11,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385877870] [2022-04-06 18:17:11,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:17:11,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:17:11,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:17:11,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:17:11,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=82, Unknown=3, NotChecked=18, Total=132 [2022-04-06 18:17:11,464 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 18:17:15,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:17:15,314 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-04-06 18:17:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:17:15,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-06 18:17:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:17:15,316 INFO L225 Difference]: With dead ends: 35 [2022-04-06 18:17:15,316 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 18:17:15,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=33, Invalid=100, Unknown=3, NotChecked=20, Total=156 [2022-04-06 18:17:15,317 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:17:15,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 107 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 51 Unchecked, 0.0s Time] [2022-04-06 18:17:15,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 18:17:15,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 18:17:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 18:17:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-06 18:17:15,327 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 24 [2022-04-06 18:17:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:17:15,327 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-06 18:17:15,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 18:17:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-06 18:17:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 18:17:15,328 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:17:15,328 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:17:15,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 18:17:15,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 18:17:15,529 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:17:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:17:15,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1991712461, now seen corresponding path program 1 times [2022-04-06 18:17:15,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:17:15,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [208764561] [2022-04-06 18:17:17,630 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 18:17:17,631 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 18:17:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1936089671, now seen corresponding path program 1 times [2022-04-06 18:17:17,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:17:17,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300934487] [2022-04-06 18:17:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:17:17,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:17:17,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:17:17,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555232720] [2022-04-06 18:17:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:17:17,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:17:17,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:17:17,641 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:17:17,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 18:17:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:17:17,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 18:17:17,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:17:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:17:17,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:17:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:17:17,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:17:17,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300934487] [2022-04-06 18:17:17,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:17:17,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555232720] [2022-04-06 18:17:17,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555232720] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:17:17,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:17:17,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 18:17:18,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:17:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [208764561] [2022-04-06 18:17:18,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [208764561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:17:18,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:17:18,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:17:18,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059246762] [2022-04-06 18:17:18,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:17:18,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:17:18,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:17:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:17:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:17:18,024 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 18:17:18,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:17:18,104 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-06 18:17:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:17:18,105 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-04-06 18:17:18,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:17:18,106 INFO L225 Difference]: With dead ends: 33 [2022-04-06 18:17:18,106 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 18:17:18,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:17:18,107 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:17:18,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 110 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 18:17:18,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 18:17:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 18:17:18,108 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) [2022-04-06 18:17:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 18:17:18,108 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-04-06 18:17:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:17:18,108 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 18:17:18,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 18:17:18,108 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 18:17:18,108 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 18:17:18,112 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 18:17:18,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 18:17:18,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:17:18,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 18:17:21,118 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-04-06 18:17:21,118 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-04-06 18:17:21,118 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-04-06 18:17:21,118 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2022-04-06 18:17:21,118 INFO L885 garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: true [2022-04-06 18:17:21,118 INFO L885 garLoopResultBuilder]: At program point L7-2(lines 6 8) the Hoare annotation is: true [2022-04-06 18:17:21,119 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 6 8) the Hoare annotation is: true [2022-04-06 18:17:21,119 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2022-04-06 18:17:21,119 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (or (and (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) (< main_~c~0 (+ main_~k~0 1))) (and (= main_~x~0 0) (= main_~c~0 0) (= main_~y~0 0))) [2022-04-06 18:17:21,119 INFO L878 garLoopResultBuilder]: At program point L28-1(lines 27 36) the Hoare annotation is: (or (and (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) (< main_~c~0 (+ main_~k~0 1))) (and (= main_~y~0 0) (exists ((v_main_~c~0_BEFORE_RETURN_1 Int) (v_main_~y~0_15 Int) (v_main_~k~0_BEFORE_RETURN_1 Int) (v_main_~x~0_15 Int) (v___VERIFIER_assert_~cond_BEFORE_RETURN_1 Int)) (let ((.cse1 (= v___VERIFIER_assert_~cond_BEFORE_RETURN_1 1)) (.cse2 (= v___VERIFIER_assert_~cond_BEFORE_RETURN_1 0))) (and (let ((.cse0 (= (+ v_main_~y~0_15 (* v_main_~y~0_15 v_main_~y~0_15)) (* v_main_~x~0_15 2)))) (or (and .cse0 .cse1) (and .cse2 (not .cse0)))) (let ((.cse3 (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))))) (or (and .cse1 .cse3) (and .cse2 (not .cse3)))) (let ((.cse5 (* (- 1) v_main_~c~0_BEFORE_RETURN_1))) (or (let ((.cse4 (div .cse5 (- 2)))) (and (= (* 2 .cse4) v_main_~y~0_15) (< 0 .cse4) (= v_main_~x~0_15 (+ (* 2 (* .cse4 .cse4)) .cse4)) (< .cse4 (+ (div (+ v_main_~k~0_BEFORE_RETURN_1 (- 2)) 2) 2)) (= (mod v_main_~c~0_BEFORE_RETURN_1 2) 0))) (let ((.cse6 (div (+ .cse5 1) (- 2)))) (and (= v_main_~y~0_15 (+ (* .cse6 2) 1)) (< .cse6 (+ (div (+ (- 1) v_main_~k~0_BEFORE_RETURN_1) 2) 1)) (= v_main_~x~0_15 (+ (* .cse6 3) (* 2 (* .cse6 .cse6)) 1)) (<= 0 .cse6) (= (mod (+ v_main_~c~0_BEFORE_RETURN_1 1) 2) 0))) (and (= v_main_~x~0_15 0) (= v_main_~y~0_15 0) (= v_main_~c~0_BEFORE_RETURN_1 0))))))))) [2022-04-06 18:17:21,119 INFO L878 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (or (and (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) (< main_~c~0 (+ main_~k~0 1))) (and (= main_~x~0 0) (= main_~c~0 0) (= main_~y~0 0))) [2022-04-06 18:17:21,119 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 17 40) the Hoare annotation is: true [2022-04-06 18:17:21,119 INFO L878 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (and (= main_~x~0 0) (= main_~y~0 0)) (and (= (+ (* main_~x~0 2) (* (- 2) main_~y~0)) (+ (- 1) main_~y~0 (let ((.cse0 (+ (- 1) main_~y~0))) (* .cse0 .cse0)))) (< main_~c~0 (+ main_~k~0 1)))) [2022-04-06 18:17:21,119 INFO L885 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2022-04-06 18:17:21,119 INFO L885 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: true [2022-04-06 18:17:21,119 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 17 40) the Hoare annotation is: true [2022-04-06 18:17:21,119 INFO L885 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: true [2022-04-06 18:17:21,119 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 18:17:21,120 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 18:17:21,120 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 18:17:21,120 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 18:17:21,120 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 18:17:21,120 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 18:17:21,120 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 18:17:21,120 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-04-06 18:17:21,120 INFO L878 garLoopResultBuilder]: At program point L11(lines 11 12) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 18:17:21,120 INFO L878 garLoopResultBuilder]: At program point L10(lines 10 13) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-04-06 18:17:21,120 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 9 15) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-04-06 18:17:21,120 INFO L878 garLoopResultBuilder]: At program point L10-2(lines 9 15) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-04-06 18:17:21,120 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 18:17:21,122 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-04-06 18:17:21,123 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 18:17:21,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:17:21 BoogieIcfgContainer [2022-04-06 18:17:21,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 18:17:21,134 INFO L158 Benchmark]: Toolchain (without parser) took 20560.35ms. Allocated memory was 180.4MB in the beginning and 220.2MB in the end (delta: 39.8MB). Free memory was 134.6MB in the beginning and 161.6MB in the end (delta: -27.0MB). Peak memory consumption was 14.4MB. Max. memory is 8.0GB. [2022-04-06 18:17:21,134 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 180.4MB. Free memory is still 150.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 18:17:21,134 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.87ms. Allocated memory is still 180.4MB. Free memory was 134.4MB in the beginning and 159.7MB in the end (delta: -25.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 18:17:21,134 INFO L158 Benchmark]: Boogie Preprocessor took 37.60ms. Allocated memory is still 180.4MB. Free memory was 159.7MB in the beginning and 158.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 18:17:21,135 INFO L158 Benchmark]: RCFGBuilder took 181.63ms. Allocated memory is still 180.4MB. Free memory was 158.2MB in the beginning and 148.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 18:17:21,135 INFO L158 Benchmark]: TraceAbstraction took 20128.76ms. Allocated memory was 180.4MB in the beginning and 220.2MB in the end (delta: 39.8MB). Free memory was 147.8MB in the beginning and 161.6MB in the end (delta: -13.8MB). Peak memory consumption was 27.4MB. Max. memory is 8.0GB. [2022-04-06 18:17:21,136 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 180.4MB. Free memory is still 150.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.87ms. Allocated memory is still 180.4MB. Free memory was 134.4MB in the beginning and 159.7MB in the end (delta: -25.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.60ms. Allocated memory is still 180.4MB. Free memory was 159.7MB in the beginning and 158.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 181.63ms. Allocated memory is still 180.4MB. Free memory was 158.2MB in the beginning and 148.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 20128.76ms. Allocated memory was 180.4MB in the beginning and 220.2MB in the end (delta: 39.8MB). Free memory was 147.8MB in the beginning and 161.6MB in the end (delta: -13.8MB). Peak memory consumption was 27.4MB. 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: 12]: 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 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 20.1s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 43 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38 mSDsluCounter, 317 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 51 IncrementalHoareTripleChecker+Unchecked, 231 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 92 IncrementalHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 86 mSDtfsCounter, 92 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 12.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=3, InterpolantAutomatonStates: 24, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 27 LocationsWithAnnotation, 63 PreInvPairs, 95 NumberOfFragments, 369 HoareAnnotationTreeSize, 63 FomulaSimplifications, 23 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 27 FomulaSimplificationsInter, 2824 FormulaSimplificationTreeSizeReductionInter, 2.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (x * 2 == y + y * y && c < k + 1) || ((x == 0 && c == 0) && y == 0) - ProcedureContractResult [Line: 6]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(\old(cond) == 1) || \old(cond) == cond RESULT: Ultimate proved your program to be correct! [2022-04-06 18:17:21,205 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...