/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/ps4-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 06:16:41,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 06:16:41,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 06:16:41,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 06:16:41,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 06:16:41,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 06:16:41,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 06:16:41,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 06:16:41,667 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 06:16:41,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 06:16:41,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 06:16:41,670 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 06:16:41,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 06:16:41,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 06:16:41,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 06:16:41,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 06:16:41,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 06:16:41,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 06:16:41,672 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 06:16:41,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 06:16:41,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 06:16:41,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 06:16:41,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 06:16:41,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 06:16:41,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 06:16:41,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 06:16:41,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:16:41,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 06:16:41,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 06:16:41,673 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 06:16:41,673 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 06:16:41,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 06:16:41,673 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 06:16:41,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 06:16:41,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 06:16:41,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 06:16:41,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 06:16:41,969 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 06:16:41,969 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 06:16:41,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c [2022-03-19 06:16:42,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24491abb8/9b3a2cddc67d4e02a31722546b3818c8/FLAGad9fe5593 [2022-03-19 06:16:42,453 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 06:16:42,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c [2022-03-19 06:16:42,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24491abb8/9b3a2cddc67d4e02a31722546b3818c8/FLAGad9fe5593 [2022-03-19 06:16:42,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24491abb8/9b3a2cddc67d4e02a31722546b3818c8 [2022-03-19 06:16:42,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 06:16:42,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 06:16:42,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 06:16:42,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 06:16:42,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 06:16:42,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:16:42" (1/1) ... [2022-03-19 06:16:42,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d4cb7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:42, skipping insertion in model container [2022-03-19 06:16:42,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:16:42" (1/1) ... [2022-03-19 06:16:42,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 06:16:42,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 06:16:43,021 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/ps4-ll_valuebound5.c[458,471] [2022-03-19 06:16:43,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:16:43,043 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 06:16:43,052 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/ps4-ll_valuebound5.c[458,471] [2022-03-19 06:16:43,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:16:43,072 INFO L208 MainTranslator]: Completed translation [2022-03-19 06:16:43,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:43 WrapperNode [2022-03-19 06:16:43,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 06:16:43,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 06:16:43,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 06:16:43,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 06:16:43,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:43" (1/1) ... [2022-03-19 06:16:43,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:43" (1/1) ... [2022-03-19 06:16:43,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:43" (1/1) ... [2022-03-19 06:16:43,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:43" (1/1) ... [2022-03-19 06:16:43,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:43" (1/1) ... [2022-03-19 06:16:43,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:43" (1/1) ... [2022-03-19 06:16:43,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:43" (1/1) ... [2022-03-19 06:16:43,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 06:16:43,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 06:16:43,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 06:16:43,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 06:16:43,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:43" (1/1) ... [2022-03-19 06:16:43,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:16:43,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:16:43,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 06:16:43,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 06:16:43,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 06:16:43,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 06:16:43,188 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 06:16:43,188 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 06:16:43,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 06:16:43,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 06:16:43,189 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 06:16:43,189 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 06:16:43,189 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 06:16:43,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 06:16:43,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-19 06:16:43,191 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 06:16:43,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 06:16:43,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 06:16:43,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 06:16:43,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 06:16:43,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 06:16:43,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 06:16:43,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 06:16:43,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 06:16:43,250 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 06:16:43,252 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 06:16:43,369 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 06:16:43,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 06:16:43,375 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 06:16:43,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:16:43 BoogieIcfgContainer [2022-03-19 06:16:43,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 06:16:43,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 06:16:43,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 06:16:43,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 06:16:43,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 06:16:42" (1/3) ... [2022-03-19 06:16:43,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c2c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:16:43, skipping insertion in model container [2022-03-19 06:16:43,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:16:43" (2/3) ... [2022-03-19 06:16:43,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c2c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:16:43, skipping insertion in model container [2022-03-19 06:16:43,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:16:43" (3/3) ... [2022-03-19 06:16:43,386 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound5.c [2022-03-19 06:16:43,391 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 06:16:43,391 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 06:16:43,426 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 06:16:43,436 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 [2022-03-19 06:16:43,437 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 06:16:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:16:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 06:16:43,456 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:16:43,457 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:16:43,457 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:16:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:16:43,462 INFO L85 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2022-03-19 06:16:43,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:43,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891250802] [2022-03-19 06:16:43,478 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:16:43,479 INFO L85 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 2 times [2022-03-19 06:16:43,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:16:43,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112868876] [2022-03-19 06:16:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:16:43,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:16:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:16:43,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:16:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:16:43,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:16:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:16:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:16:43,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:16:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112868876] [2022-03-19 06:16:43,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112868876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:43,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:43,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 06:16:43,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:16:43,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891250802] [2022-03-19 06:16:43,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891250802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:43,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:43,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 06:16:43,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946508007] [2022-03-19 06:16:43,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:16:43,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 06:16:43,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 06:16:43,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 06:16:43,739 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:16:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:16:43,807 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-03-19 06:16:43,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 06:16:43,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 06:16:43,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:16:43,822 INFO L225 Difference]: With dead ends: 47 [2022-03-19 06:16:43,822 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 06:16:43,825 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 06:16:43,832 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:16:43,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:16:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 06:16:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-19 06:16:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:16:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-19 06:16:43,896 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-03-19 06:16:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:16:43,896 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-19 06:16:43,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:16:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-19 06:16:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 06:16:43,899 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:16:43,899 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:16:43,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 06:16:43,900 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:16:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:16:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2022-03-19 06:16:43,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1812251922] [2022-03-19 06:16:43,905 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:16:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 2 times [2022-03-19 06:16:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:16:43,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15964639] [2022-03-19 06:16:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:16:43,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:16:43,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:16:43,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333186415] [2022-03-19 06:16:43,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:16:43,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:43,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:16:43,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:16:43,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 06:16:44,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 06:16:44,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:16:44,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 06:16:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:16:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:16:44,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 06:16:44,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:16:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15964639] [2022-03-19 06:16:44,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:16:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333186415] [2022-03-19 06:16:44,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333186415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:44,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:44,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:16:44,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:16:44,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1812251922] [2022-03-19 06:16:44,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1812251922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:44,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:44,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:16:44,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751489798] [2022-03-19 06:16:44,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:16:44,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:16:44,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:16:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 06:16:44,189 INFO L87 Difference]: Start difference. First operand 23 states and 25 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) [2022-03-19 06:16:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:16:44,254 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-19 06:16:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:16:44,255 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 [2022-03-19 06:16:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:16:44,256 INFO L225 Difference]: With dead ends: 34 [2022-03-19 06:16:44,256 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 06:16:44,258 INFO L911 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 [2022-03-19 06:16:44,259 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:16:44,263 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:16:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 06:16:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 06:16:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:16:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-19 06:16:44,282 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-19 06:16:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:16:44,283 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-19 06:16:44,283 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) [2022-03-19 06:16:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-19 06:16:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 06:16:44,285 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:16:44,286 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:16:44,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 06:16:44,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:44,500 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:16:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:16:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2022-03-19 06:16:44,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:44,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [828581991] [2022-03-19 06:16:44,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:16:44,524 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:16:44,524 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:16:44,524 INFO L85 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 2 times [2022-03-19 06:16:44,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:16:44,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265641660] [2022-03-19 06:16:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:16:44,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:16:44,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:16:44,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383274350] [2022-03-19 06:16:44,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:16:44,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:16:44,563 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:16:44,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 06:16:44,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:16:44,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:16:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 06:16:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:16:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:16:44,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:16:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:16:53,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:16:53,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265641660] [2022-03-19 06:16:53,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:16:53,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383274350] [2022-03-19 06:16:53,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383274350] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 06:16:53,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:16:53,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 06:16:53,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:16:53,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [828581991] [2022-03-19 06:16:53,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [828581991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:53,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:53,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:16:53,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361923485] [2022-03-19 06:16:53,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:16:53,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:16:53,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:53,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:16:53,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2022-03-19 06:16:53,283 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:16:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:16:53,322 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-03-19 06:16:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:16:53,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-19 06:16:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:16:53,324 INFO L225 Difference]: With dead ends: 36 [2022-03-19 06:16:53,324 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 06:16:53,324 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-03-19 06:16:53,325 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:16:53,326 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:16:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 06:16:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-19 06:16:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:16:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-19 06:16:53,333 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-03-19 06:16:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:16:53,334 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-19 06:16:53,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:16:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-19 06:16:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 06:16:53,335 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:16:53,335 INFO L500 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] [2022-03-19 06:16:53,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 06:16:53,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 06:16:53,549 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:16:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:16:53,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 1 times [2022-03-19 06:16:53,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:53,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322889091] [2022-03-19 06:16:53,554 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:16:53,554 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:16:53,554 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:16:53,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 2 times [2022-03-19 06:16:53,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:16:53,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967841505] [2022-03-19 06:16:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:16:53,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:16:53,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:16:53,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848363107] [2022-03-19 06:16:53,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:16:53,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:53,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:16:53,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:16:53,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 06:16:53,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:16:53,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:16:53,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 06:16:53,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:16:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:16:53,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:16:53,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:16:53,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967841505] [2022-03-19 06:16:53,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:16:53,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848363107] [2022-03-19 06:16:53,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848363107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:16:53,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:16:53,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 06:16:53,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:16:53,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322889091] [2022-03-19 06:16:53,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322889091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:53,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:53,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:16:53,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911941517] [2022-03-19 06:16:53,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:16:53,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:16:53,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:16:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:16:53,932 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 06:16:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:16:53,998 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-03-19 06:16:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 06:16:53,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-03-19 06:16:53,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:16:53,999 INFO L225 Difference]: With dead ends: 39 [2022-03-19 06:16:54,000 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 06:16:54,000 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:16:54,001 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:16:54,002 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:16:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 06:16:54,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 06:16:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) 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), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:16:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-19 06:16:54,009 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-03-19 06:16:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:16:54,010 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-19 06:16:54,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 06:16:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-19 06:16:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 06:16:54,011 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:16:54,011 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:16:54,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 06:16:54,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:54,239 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:16:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:16:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 3 times [2022-03-19 06:16:54,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:54,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111125813] [2022-03-19 06:16:54,243 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:16:54,243 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:16:54,243 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:16:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 4 times [2022-03-19 06:16:54,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:16:54,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054887621] [2022-03-19 06:16:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:16:54,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:16:54,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:16:54,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821534429] [2022-03-19 06:16:54,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:16:54,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:54,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:16:54,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:16:54,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 06:16:54,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:16:54,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:16:54,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 06:16:54,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:16:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 06:16:54,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:16:54,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:16:54,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054887621] [2022-03-19 06:16:54,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:16:54,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821534429] [2022-03-19 06:16:54,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821534429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:16:54,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:16:54,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 06:16:54,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:16:54,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111125813] [2022-03-19 06:16:54,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111125813] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:54,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:54,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:16:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340216746] [2022-03-19 06:16:54,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:16:54,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:16:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:16:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:16:54,879 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:16:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:16:55,019 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-03-19 06:16:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:16:55,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-19 06:16:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:16:55,022 INFO L225 Difference]: With dead ends: 46 [2022-03-19 06:16:55,022 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 06:16:55,023 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:16:55,023 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:16:55,024 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:16:55,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 06:16:55,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-19 06:16:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:16:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-03-19 06:16:55,032 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2022-03-19 06:16:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:16:55,033 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-03-19 06:16:55,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:16:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-03-19 06:16:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 06:16:55,034 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:16:55,034 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:16:55,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 06:16:55,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:55,248 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:16:55,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:16:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 5 times [2022-03-19 06:16:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:55,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [773432909] [2022-03-19 06:16:55,251 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:16:55,251 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:16:55,251 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:16:55,251 INFO L85 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 6 times [2022-03-19 06:16:55,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:16:55,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593493315] [2022-03-19 06:16:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:16:55,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:16:55,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:16:55,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708589745] [2022-03-19 06:16:55,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:16:55,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:55,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:16:55,267 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:16:55,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 06:16:55,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 06:16:55,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:16:55,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 06:16:55,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:16:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 06:16:55,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:16:55,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:16:55,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593493315] [2022-03-19 06:16:55,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:16:55,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708589745] [2022-03-19 06:16:55,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708589745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:16:55,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:16:55,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 06:16:55,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:16:55,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [773432909] [2022-03-19 06:16:55,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [773432909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:55,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:55,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:16:55,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975258415] [2022-03-19 06:16:55,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:16:55,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:16:55,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:55,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:16:55,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:16:55,808 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 06:16:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:16:55,921 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-03-19 06:16:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:16:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-03-19 06:16:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:16:55,922 INFO L225 Difference]: With dead ends: 49 [2022-03-19 06:16:55,922 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 06:16:55,923 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:16:55,923 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:16:55,924 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:16:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 06:16:55,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 06:16:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:16:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-19 06:16:55,939 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 44 [2022-03-19 06:16:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:16:55,940 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-19 06:16:55,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 06:16:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-19 06:16:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 06:16:55,941 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:16:55,941 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:16:55,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 06:16:56,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:56,152 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:16:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:16:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 7 times [2022-03-19 06:16:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [361617360] [2022-03-19 06:16:56,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:16:56,155 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:16:56,155 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:16:56,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 8 times [2022-03-19 06:16:56,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:16:56,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305509849] [2022-03-19 06:16:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:16:56,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:16:56,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:16:56,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414524365] [2022-03-19 06:16:56,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:16:56,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:56,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:16:56,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:16:56,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 06:16:56,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:16:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:16:56,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 06:16:56,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:16:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 06:16:56,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:16:56,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:16:56,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305509849] [2022-03-19 06:16:56,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:16:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414524365] [2022-03-19 06:16:56,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414524365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:16:56,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:16:56,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 06:16:56,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:16:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [361617360] [2022-03-19 06:16:56,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [361617360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:56,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:56,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:16:56,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124028502] [2022-03-19 06:16:56,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:16:56,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:16:56,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:56,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:16:56,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:16:56,715 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 06:16:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:16:56,835 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-03-19 06:16:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:16:56,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-03-19 06:16:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:16:56,837 INFO L225 Difference]: With dead ends: 52 [2022-03-19 06:16:56,837 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 06:16:56,837 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:16:56,838 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:16:56,838 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:16:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 06:16:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 06:16:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 06:16:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-03-19 06:16:56,847 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 51 [2022-03-19 06:16:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:16:56,847 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-03-19 06:16:56,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 06:16:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-03-19 06:16:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 06:16:56,849 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:16:56,849 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:16:56,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 06:16:57,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:57,075 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:16:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:16:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 9 times [2022-03-19 06:16:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:57,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [158791315] [2022-03-19 06:16:57,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:16:57,079 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:16:57,079 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:16:57,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 10 times [2022-03-19 06:16:57,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:16:57,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480391338] [2022-03-19 06:16:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:16:57,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:16:57,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:16:57,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076806780] [2022-03-19 06:16:57,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:16:57,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:57,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:16:57,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:16:57,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 06:16:57,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:16:57,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:16:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 06:16:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:16:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 06:16:57,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:16:57,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:16:57,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480391338] [2022-03-19 06:16:57,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:16:57,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076806780] [2022-03-19 06:16:57,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076806780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:16:57,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:16:57,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 06:16:57,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:16:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [158791315] [2022-03-19 06:16:57,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [158791315] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:57,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:57,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:16:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896168012] [2022-03-19 06:16:57,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:16:57,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:16:57,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:16:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:16:57,641 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 06:16:57,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:16:57,788 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-03-19 06:16:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:16:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-03-19 06:16:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:16:57,790 INFO L225 Difference]: With dead ends: 55 [2022-03-19 06:16:57,790 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 06:16:57,790 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:16:57,791 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:16:57,791 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:16:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 06:16:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-19 06:16:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:16:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-03-19 06:16:57,800 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 58 [2022-03-19 06:16:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:16:57,801 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-03-19 06:16:57,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 06:16:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-03-19 06:16:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 06:16:57,802 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:16:57,802 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:16:57,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 06:16:58,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:58,009 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:16:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:16:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 11 times [2022-03-19 06:16:58,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:58,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [97808276] [2022-03-19 06:16:58,012 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:16:58,012 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:16:58,012 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:16:58,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 12 times [2022-03-19 06:16:58,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:16:58,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274180234] [2022-03-19 06:16:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:16:58,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:16:58,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:16:58,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788397917] [2022-03-19 06:16:58,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:16:58,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:16:58,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:16:58,026 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:16:58,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 06:16:58,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 06:16:58,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:16:58,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 06:16:58,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:16:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-03-19 06:16:58,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 06:16:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:16:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274180234] [2022-03-19 06:16:58,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:16:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788397917] [2022-03-19 06:16:58,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788397917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:58,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:58,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:16:58,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:16:58,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [97808276] [2022-03-19 06:16:58,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [97808276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:16:58,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:16:58,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:16:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112344231] [2022-03-19 06:16:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:16:58,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:16:58,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:16:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:16:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:16:58,488 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 06:16:58,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:16:58,560 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-03-19 06:16:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:16:58,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2022-03-19 06:16:58,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:16:58,562 INFO L225 Difference]: With dead ends: 54 [2022-03-19 06:16:58,562 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 06:16:58,562 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:16:58,565 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:16:58,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:16:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 06:16:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 06:16:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 06:16:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 06:16:58,566 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2022-03-19 06:16:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:16:58,566 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 06:16:58,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 06:16:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 06:16:58,567 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 06:16:58,569 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 06:16:58,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 06:16:58,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 06:16:58,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 06:16:59,391 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-03-19 06:16:59,391 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-03-19 06:16:59,391 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-03-19 06:16:59,391 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2022-03-19 06:16:59,391 INFO L878 garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-19 06:16:59,391 INFO L878 garLoopResultBuilder]: At program point L7-2(lines 6 8) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 06:16:59,392 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 6 8) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 06:16:59,392 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2022-03-19 06:16:59,392 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 5)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (<= main_~c~0 5) .cse0 (= 5 main_~y~0) .cse1 (<= 5 main_~c~0) (< 4 main_~k~0)) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and .cse0 (= main_~y~0 3) (< 2 main_~k~0) .cse1 (= main_~c~0 3)) (and (= main_~y~0 2) .cse0 (< 1 main_~k~0) (= main_~c~0 2) .cse1))) [2022-03-19 06:16:59,392 INFO L878 garLoopResultBuilder]: At program point L28-1(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 5)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (<= main_~c~0 5) .cse0 (= 5 main_~y~0) .cse1 (<= 5 main_~c~0) (< 4 main_~k~0)) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and .cse0 (= main_~y~0 3) (< 2 main_~k~0) .cse1 (= main_~c~0 3)) (and (= main_~y~0 2) .cse0 (< 1 main_~k~0) (= main_~c~0 2) .cse1))) [2022-03-19 06:16:59,392 INFO L878 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 5)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (<= main_~c~0 5) .cse0 (= 5 main_~y~0) .cse1 (<= 5 main_~c~0) (< 4 main_~k~0)) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and .cse0 (= main_~y~0 3) (< 2 main_~k~0) .cse1 (= main_~c~0 3)) (and (= main_~y~0 2) .cse0 (< 1 main_~k~0) (= main_~c~0 2) .cse1))) [2022-03-19 06:16:59,392 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 17 40) the Hoare annotation is: true [2022-03-19 06:16:59,392 INFO L878 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and (= main_~x~0 0) (= main_~y~0 0)) (and (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2) (<= main_~c~0 2) .cse0) (and (<= main_~c~0 3) (= main_~y~0 3) (<= main_~k~0 3) (< 2 main_~k~0) .cse0) (and (<= main_~k~0 1) (= main_~y~0 1) (< 0 main_~k~0) .cse0 (<= main_~c~0 1)) (and (<= main_~c~0 5) (<= main_~k~0 5) (= 5 main_~y~0) .cse0 (< 4 main_~k~0)) (and (= main_~y~0 4) (< 3 main_~k~0) (<= main_~k~0 4) .cse0 (<= main_~c~0 4)))) [2022-03-19 06:16:59,392 INFO L885 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2022-03-19 06:16:59,393 INFO L878 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: (and (<= main_~k~0 5) (<= 0 main_~k~0)) [2022-03-19 06:16:59,393 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 17 40) the Hoare annotation is: true [2022-03-19 06:16:59,393 INFO L885 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: true [2022-03-19 06:16:59,393 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)) [2022-03-19 06:16:59,393 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-19 06:16:59,393 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-19 06:16:59,393 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-19 06:16:59,393 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-19 06:16:59,393 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 06:16:59,393 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 06:16:59,394 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-19 06:16:59,394 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-03-19 06:16:59,394 INFO L878 garLoopResultBuilder]: At program point L11(lines 11 12) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 06:16:59,394 INFO L878 garLoopResultBuilder]: At program point L10(lines 10 13) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 06:16:59,394 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 9 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 06:16:59,394 INFO L878 garLoopResultBuilder]: At program point L10-2(lines 9 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 06:16:59,394 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 06:16:59,397 INFO L718 BasicCegarLoop]: Path program histogram: [12, 2, 2, 2] [2022-03-19 06:16:59,398 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 06:16:59,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 06:16:59 BoogieIcfgContainer [2022-03-19 06:16:59,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 06:16:59,418 INFO L158 Benchmark]: Toolchain (without parser) took 16562.50ms. Allocated memory was 170.9MB in the beginning and 209.7MB in the end (delta: 38.8MB). Free memory was 124.8MB in the beginning and 100.1MB in the end (delta: 24.6MB). Peak memory consumption was 64.2MB. Max. memory is 8.0GB. [2022-03-19 06:16:59,418 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 170.9MB. Free memory is still 140.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 06:16:59,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.23ms. Allocated memory is still 170.9MB. Free memory was 124.6MB in the beginning and 149.3MB in the end (delta: -24.7MB). Peak memory consumption was 13.5MB. Max. memory is 8.0GB. [2022-03-19 06:16:59,419 INFO L158 Benchmark]: Boogie Preprocessor took 37.85ms. Allocated memory is still 170.9MB. Free memory was 149.3MB in the beginning and 147.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 06:16:59,419 INFO L158 Benchmark]: RCFGBuilder took 262.68ms. Allocated memory is still 170.9MB. Free memory was 147.9MB in the beginning and 137.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 06:16:59,419 INFO L158 Benchmark]: TraceAbstraction took 16037.27ms. Allocated memory was 170.9MB in the beginning and 209.7MB in the end (delta: 38.8MB). Free memory was 137.5MB in the beginning and 100.1MB in the end (delta: 37.3MB). Peak memory consumption was 76.9MB. Max. memory is 8.0GB. [2022-03-19 06:16:59,420 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 170.9MB. Free memory is still 140.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 215.23ms. Allocated memory is still 170.9MB. Free memory was 124.6MB in the beginning and 149.3MB in the end (delta: -24.7MB). Peak memory consumption was 13.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.85ms. Allocated memory is still 170.9MB. Free memory was 149.3MB in the beginning and 147.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 262.68ms. Allocated memory is still 170.9MB. Free memory was 147.9MB in the beginning and 137.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 16037.27ms. Allocated memory was 170.9MB in the beginning and 209.7MB in the end (delta: 38.8MB). Free memory was 137.5MB in the beginning and 100.1MB in the end (delta: 37.3MB). Peak memory consumption was 76.9MB. 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, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.0s, OverallIterations: 9, TraceHistogramMax: 8, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 62 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 1345 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1097 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 535 IncrementalHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 248 mSDtfsCounter, 535 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 428 GetRequests, 334 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=8, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 28 LocationsWithAnnotation, 136 PreInvPairs, 204 NumberOfFragments, 853 HoareAnnotationTreeSize, 136 FomulaSimplifications, 276 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 28 FomulaSimplificationsInter, 147 FormulaSimplificationTreeSizeReductionInter, 0.6s 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: ((((((((k <= 5 && y == 1) && 0 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && c == 1) || ((((k <= 5 && y == 4) && c == 4) && 3 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || (((((c <= 5 && k <= 5) && 5 == y) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 5 <= c) && 4 < k)) || ((((k <= 5 && 0 <= k) && c == 0) && y == 0) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 5 && y == 3) && 2 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && c == 3)) || ((((y == 2 && k <= 5) && 1 < k) && c == 2) && y * y * y * y + y * y + y * y * y * 2 == x * 4) - ProcedureContractResult [Line: 6]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - 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) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-19 06:16:59,447 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...