/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/geo3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:59:09,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:59:09,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:59:09,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:59:09,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:59:09,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:59:09,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:59:09,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:59:09,978 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:59:09,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:59:09,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:59:09,979 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:59:09,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:59:09,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:59:09,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:59:09,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:59:09,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:59:09,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:59:09,980 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:59:09,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:59:09,980 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:59:09,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:59:09,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:59:09,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:59:09,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:59:09,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:59:09,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:59:09,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:59:09,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:59:09,982 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:59:09,982 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:59:09,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:59:09,982 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:59:09,982 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:59:10,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:59:10,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:59:10,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:59:10,234 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:59:10,234 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:59:10,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound50.c [2022-04-06 16:59:10,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dce11a279/a62e3bfa2d7e44988415e0180c59a9c6/FLAG2381a24dc [2022-04-06 16:59:10,680 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:59:10,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound50.c [2022-04-06 16:59:10,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dce11a279/a62e3bfa2d7e44988415e0180c59a9c6/FLAG2381a24dc [2022-04-06 16:59:11,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dce11a279/a62e3bfa2d7e44988415e0180c59a9c6 [2022-04-06 16:59:11,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:59:11,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:59:11,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:59:11,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:59:11,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:59:11,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:59:11" (1/1) ... [2022-04-06 16:59:11,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@565ff239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11, skipping insertion in model container [2022-04-06 16:59:11,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:59:11" (1/1) ... [2022-04-06 16:59:11,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:59:11,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:59:11,247 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/geo3-ll_valuebound50.c[525,538] [2022-04-06 16:59:11,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:59:11,267 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:59:11,276 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/geo3-ll_valuebound50.c[525,538] [2022-04-06 16:59:11,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:59:11,290 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:59:11,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11 WrapperNode [2022-04-06 16:59:11,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:59:11,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:59:11,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:59:11,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:59:11,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11" (1/1) ... [2022-04-06 16:59:11,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11" (1/1) ... [2022-04-06 16:59:11,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11" (1/1) ... [2022-04-06 16:59:11,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11" (1/1) ... [2022-04-06 16:59:11,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11" (1/1) ... [2022-04-06 16:59:11,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11" (1/1) ... [2022-04-06 16:59:11,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11" (1/1) ... [2022-04-06 16:59:11,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:59:11,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:59:11,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:59:11,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:59:11,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11" (1/1) ... [2022-04-06 16:59:11,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:59:11,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:59:11,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 16:59:11,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 16:59:11,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:59:11,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:59:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:59:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:59:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:59:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:59:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:59:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:59:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:59:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:59:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:59:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:59:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:59:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:59:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:59:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:59:11,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:59:11,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:59:11,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:59:11,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:59:11,435 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:59:11,437 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:59:11,580 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:59:11,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:59:11,585 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 16:59:11,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:59:11 BoogieIcfgContainer [2022-04-06 16:59:11,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:59:11,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:59:11,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:59:11,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:59:11,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:59:11" (1/3) ... [2022-04-06 16:59:11,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6822af83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:59:11, skipping insertion in model container [2022-04-06 16:59:11,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:59:11" (2/3) ... [2022-04-06 16:59:11,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6822af83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:59:11, skipping insertion in model container [2022-04-06 16:59:11,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:59:11" (3/3) ... [2022-04-06 16:59:11,609 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound50.c [2022-04-06 16:59:11,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:59:11,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:59:11,683 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:59:11,688 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 16:59:11,688 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:59:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 16:59:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 16:59:11,704 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:59:11,705 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:59:11,705 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:59:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:59:11,709 INFO L85 PathProgramCache]: Analyzing trace with hash -779299010, now seen corresponding path program 1 times [2022-04-06 16:59:11,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:59:11,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95322597] [2022-04-06 16:59:11,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:59:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash -779299010, now seen corresponding path program 2 times [2022-04-06 16:59:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:59:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162241759] [2022-04-06 16:59:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:59:11,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:59:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:59:11,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:59:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:59:11,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:59:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:59:11,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 16:59:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:59:11,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 16:59:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:59:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 16:59:11,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:59:11,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162241759] [2022-04-06 16:59:11,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162241759] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:59:11,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:59:11,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:59:11,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:59:11,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95322597] [2022-04-06 16:59:11,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95322597] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:59:11,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:59:11,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:59:11,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411473781] [2022-04-06 16:59:11,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:59:11,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:59:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:59:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:59:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:59:11,977 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 16:59:12,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:59:12,066 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2022-04-06 16:59:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:59:12,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-04-06 16:59:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:59:12,078 INFO L225 Difference]: With dead ends: 55 [2022-04-06 16:59:12,078 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 16:59:12,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:59:12,088 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:59:12,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:59:12,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 16:59:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 16:59:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 16:59:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-04-06 16:59:12,130 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 29 [2022-04-06 16:59:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:59:12,131 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-04-06 16:59:12,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 16:59:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-06 16:59:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 16:59:12,133 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:59:12,134 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:59:12,134 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:59:12,135 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:59:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:59:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash -963850242, now seen corresponding path program 1 times [2022-04-06 16:59:12,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:59:12,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [231375872] [2022-04-06 16:59:12,138 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:59:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash -963850242, now seen corresponding path program 2 times [2022-04-06 16:59:12,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:59:12,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576301256] [2022-04-06 16:59:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:59:12,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:59:12,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:59:12,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643990168] [2022-04-06 16:59:12,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:59:12,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:59:12,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:59:12,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:59:12,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:59:12,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:59:12,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:59:12,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:59:12,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:59:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 16:59:12,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:59:12,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:59:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576301256] [2022-04-06 16:59:12,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:59:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643990168] [2022-04-06 16:59:12,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643990168] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:59:12,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:59:12,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:59:12,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:59:12,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [231375872] [2022-04-06 16:59:12,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [231375872] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:59:12,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:59:12,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:59:12,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676019929] [2022-04-06 16:59:12,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:59:12,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:59:12,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:59:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:59:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:59:12,427 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 16:59:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:59:12,483 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-04-06 16:59:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:59:12,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-04-06 16:59:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:59:12,485 INFO L225 Difference]: With dead ends: 36 [2022-04-06 16:59:12,485 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 16:59:12,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:59:12,486 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:59:12,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:59:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 16:59:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 16:59:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 16:59:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-06 16:59:12,501 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2022-04-06 16:59:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:59:12,503 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-06 16:59:12,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 16:59:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-06 16:59:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 16:59:12,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:59:12,504 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:59:12,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 16:59:12,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:59:12,711 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:59:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:59:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash -425626518, now seen corresponding path program 1 times [2022-04-06 16:59:12,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:59:12,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [708111579] [2022-04-06 16:59:12,712 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:59:12,712 INFO L85 PathProgramCache]: Analyzing trace with hash -425626518, now seen corresponding path program 2 times [2022-04-06 16:59:12,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:59:12,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877652043] [2022-04-06 16:59:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:59:12,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:59:12,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:59:12,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137933131] [2022-04-06 16:59:12,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:59:12,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:59:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:59:12,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:59:12,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:59:12,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:59:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:59:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 16:59:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:59:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 16:59:13,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:59:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 16:59:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:59:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877652043] [2022-04-06 16:59:13,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:59:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137933131] [2022-04-06 16:59:13,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137933131] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:59:13,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:59:13,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-06 16:59:13,429 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:59:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [708111579] [2022-04-06 16:59:13,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [708111579] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:59:13,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:59:13,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:59:13,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386588422] [2022-04-06 16:59:13,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:59:13,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:59:13,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:59:13,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:59:13,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:59:13,432 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:59:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:59:13,766 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-04-06 16:59:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:59:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-06 16:59:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:59:13,768 INFO L225 Difference]: With dead ends: 43 [2022-04-06 16:59:13,768 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 16:59:13,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:59:13,770 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:59:13,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 131 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:59:13,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 16:59:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 16:59:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 16:59:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-04-06 16:59:13,778 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2022-04-06 16:59:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:59:13,779 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-04-06 16:59:13,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:59:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-04-06 16:59:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 16:59:13,780 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:59:13,780 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:59:13,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 16:59:13,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 16:59:13,996 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:59:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:59:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1540046462, now seen corresponding path program 3 times [2022-04-06 16:59:13,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:59:13,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1323627254] [2022-04-06 16:59:13,997 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:59:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1540046462, now seen corresponding path program 4 times [2022-04-06 16:59:13,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:59:13,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357402997] [2022-04-06 16:59:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:59:13,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:59:14,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:59:14,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187094079] [2022-04-06 16:59:14,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:59:14,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:59:14,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:59:14,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:59:14,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 16:59:14,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:59:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:59:14,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 16:59:14,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:59:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:59:14,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:59:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 16:59:14,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:59:14,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357402997] [2022-04-06 16:59:14,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:59:14,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187094079] [2022-04-06 16:59:14,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187094079] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:59:14,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:59:14,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 16:59:14,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:59:14,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1323627254] [2022-04-06 16:59:14,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1323627254] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:59:14,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:59:14,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:59:14,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393990233] [2022-04-06 16:59:14,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:59:14,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:59:14,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:59:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:59:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:59:14,547 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:59:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:59:14,801 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-04-06 16:59:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:59:14,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-04-06 16:59:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:59:14,803 INFO L225 Difference]: With dead ends: 50 [2022-04-06 16:59:14,803 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 16:59:14,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:59:14,805 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:59:14,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 175 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:59:14,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 16:59:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 16:59:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 16:59:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-04-06 16:59:14,816 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2022-04-06 16:59:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:59:14,816 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-04-06 16:59:14,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:59:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-04-06 16:59:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 16:59:14,818 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:59:14,818 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:59:14,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 16:59:15,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:59:15,031 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:59:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:59:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1099019754, now seen corresponding path program 5 times [2022-04-06 16:59:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:59:15,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1209392094] [2022-04-06 16:59:15,032 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:59:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1099019754, now seen corresponding path program 6 times [2022-04-06 16:59:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:59:15,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516706696] [2022-04-06 16:59:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:59:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:59:15,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:59:15,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763213803] [2022-04-06 16:59:15,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:59:15,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:59:15,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:59:15,046 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) [2022-04-06 16:59:15,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 16:59:15,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 16:59:15,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:59:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 16:59:15,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:59:16,024 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:59:16,027 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:59:16,030 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:59:26,120 WARN L833 $PredicateComparison]: unable to prove that (and (= (* c_main_~a~0 c_main_~z~0) c_main_~az~0) (let ((.cse1 (+ (* (- 1) c_main_~a~0) c_main_~x~0)) (.cse0 (= c_main_~z~0 0))) (or (and (= c_main_~y~0 0) (exists ((v_main_~x~0_22 Int) (v_main_~y~0_21 Int)) (= (+ v_main_~x~0_22 (* v_main_~y~0_21 c_main_~az~0)) (+ (* v_main_~x~0_22 c_main_~z~0) c_main_~a~0))) .cse0 (= 0 .cse1)) (and (= (mod .cse1 c_main_~z~0) 0) (let ((.cse2 (= c_main_~az~0 0)) (.cse3 (let ((.cse4 (div .cse1 c_main_~z~0))) (+ (* .cse4 c_main_~z~0) (* (- 1) .cse4) c_main_~a~0)))) (or (and (= (mod c_main_~y~0 c_main_~z~0) 0) .cse2 (= .cse3 0)) (and (= (* (div .cse3 c_main_~az~0) c_main_~z~0) c_main_~y~0) (not .cse2) (= (mod .cse3 c_main_~az~0) 0)))) (not .cse0))))) is different from false [2022-04-06 16:59:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 6 not checked. [2022-04-06 16:59:31,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:59:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 16:59:32,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:59:32,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516706696] [2022-04-06 16:59:32,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:59:32,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763213803] [2022-04-06 16:59:32,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763213803] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:59:32,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:59:32,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-06 16:59:32,035 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:59:32,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1209392094] [2022-04-06 16:59:32,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1209392094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:59:32,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:59:32,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:59:32,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245125541] [2022-04-06 16:59:32,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:59:32,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:59:32,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:59:32,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:59:32,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=100, Unknown=1, NotChecked=20, Total=156 [2022-04-06 16:59:32,036 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 17:00:03,327 WARN L232 SmtUtils]: Spent 31.17s on a formula simplification. DAG size of input: 51 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 17:00:05,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 17:00:07,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 17:00:09,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 17:00:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:00:09,923 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-04-06 17:00:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 17:00:09,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2022-04-06 17:00:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:00:09,924 INFO L225 Difference]: With dead ends: 47 [2022-04-06 17:00:09,924 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 17:00:09,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=48, Invalid=137, Unknown=1, NotChecked=24, Total=210 [2022-04-06 17:00:09,926 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-04-06 17:00:09,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 117 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 3 Unknown, 14 Unchecked, 6.7s Time] [2022-04-06 17:00:09,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 17:00:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 17:00:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 17:00:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 17:00:09,927 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2022-04-06 17:00:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:00:09,927 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 17:00:09,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 17:00:09,928 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 17:00:09,928 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 17:00:09,932 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 17:00:09,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 17:00:10,133 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 [2022-04-06 17:00:10,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 17:00:48,803 WARN L232 SmtUtils]: Spent 38.64s on a formula simplification. DAG size of input: 54 DAG size of output: 44 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 17:01:30,384 WARN L232 SmtUtils]: Spent 41.58s on a formula simplification. DAG size of input: 54 DAG size of output: 44 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 17:01:30,515 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 17:01:30,516 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 17:01:30,516 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 17:01:30,516 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 17:01:30,516 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 17:01:30,516 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 17:01:30,516 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 17:01:30,516 INFO L885 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-04-06 17:01:30,516 INFO L885 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: true [2022-04-06 17:01:30,516 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-04-06 17:01:30,517 INFO L885 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: true [2022-04-06 17:01:30,517 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-04-06 17:01:30,517 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 21 48) the Hoare annotation is: true [2022-04-06 17:01:30,517 INFO L885 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: true [2022-04-06 17:01:30,517 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-04-06 17:01:30,517 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 21 48) the Hoare annotation is: true [2022-04-06 17:01:30,517 INFO L878 garLoopResultBuilder]: At program point L36-2(lines 36 45) the Hoare annotation is: (let ((.cse0 (= main_~a~0 main_~x~0)) (.cse3 (= (* main_~a~0 main_~z~0) main_~az~0))) (or (and (or (and (= main_~y~0 0) .cse0) (and (let ((.cse1 (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0))) (let ((.cse2 (* .cse1 main_~z~0))) (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse1 (+ main_~a~0 .cse2))) (and (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) .cse1) main_~a~0 .cse2) main_~az~0) main_~z~0) main_~y~0))))) (not (= main_~z~0 0)))) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) .cse3) (and (= main_~y~0 1) .cse0 .cse3))) [2022-04-06 17:01:30,517 INFO L878 garLoopResultBuilder]: At program point L36-3(lines 36 45) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0)) [2022-04-06 17:01:30,517 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 21 48) the Hoare annotation is: true [2022-04-06 17:01:30,518 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (= main_~a~0 main_~x~0)) (.cse3 (= (* main_~a~0 main_~z~0) main_~az~0))) (or (and (or (and (= main_~y~0 0) .cse0) (and (let ((.cse1 (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0))) (let ((.cse2 (* .cse1 main_~z~0))) (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse1 (+ main_~a~0 .cse2))) (and (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) .cse1) main_~a~0 .cse2) main_~az~0) main_~z~0) main_~y~0))))) (not (= main_~z~0 0)))) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) .cse3) (and (= main_~y~0 1) .cse0 .cse3))) [2022-04-06 17:01:30,518 INFO L878 garLoopResultBuilder]: At program point L37-1(lines 36 45) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0)) [2022-04-06 17:01:30,518 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 17:01:30,518 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 17:01:30,518 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 17:01:30,518 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 17:01:30,518 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 17:01:30,518 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 17:01:30,518 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 17:01:30,518 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 17:01:30,519 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 17:01:30,519 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 17:01:30,519 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 17:01:30,519 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 17:01:30,519 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 17:01:30,521 INFO L719 BasicCegarLoop]: Path program histogram: [6, 2, 2] [2022-04-06 17:01:30,522 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 17:01:30,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 05:01:30 BoogieIcfgContainer [2022-04-06 17:01:30,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 17:01:30,535 INFO L158 Benchmark]: Toolchain (without parser) took 139445.52ms. Allocated memory was 168.8MB in the beginning and 206.6MB in the end (delta: 37.7MB). Free memory was 120.7MB in the beginning and 82.5MB in the end (delta: 38.2MB). Peak memory consumption was 77.3MB. Max. memory is 8.0GB. [2022-04-06 17:01:30,536 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 168.8MB. Free memory was 136.9MB in the beginning and 136.8MB in the end (delta: 75.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 17:01:30,536 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.33ms. Allocated memory is still 168.8MB. Free memory was 120.5MB in the beginning and 145.3MB in the end (delta: -24.7MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. [2022-04-06 17:01:30,536 INFO L158 Benchmark]: Boogie Preprocessor took 21.07ms. Allocated memory is still 168.8MB. Free memory was 145.3MB in the beginning and 144.0MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 17:01:30,536 INFO L158 Benchmark]: RCFGBuilder took 273.28ms. Allocated memory is still 168.8MB. Free memory was 144.0MB in the beginning and 133.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 17:01:30,537 INFO L158 Benchmark]: TraceAbstraction took 138946.86ms. Allocated memory was 168.8MB in the beginning and 206.6MB in the end (delta: 37.7MB). Free memory was 133.1MB in the beginning and 82.5MB in the end (delta: 50.7MB). Peak memory consumption was 89.3MB. Max. memory is 8.0GB. [2022-04-06 17:01:30,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 168.8MB. Free memory was 136.9MB in the beginning and 136.8MB in the end (delta: 75.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 200.33ms. Allocated memory is still 168.8MB. Free memory was 120.5MB in the beginning and 145.3MB in the end (delta: -24.7MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.07ms. Allocated memory is still 168.8MB. Free memory was 145.3MB in the beginning and 144.0MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 273.28ms. Allocated memory is still 168.8MB. Free memory was 144.0MB in the beginning and 133.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 138946.86ms. Allocated memory was 168.8MB in the beginning and 206.6MB in the end (delta: 37.7MB). Free memory was 133.1MB in the beginning and 82.5MB in the end (delta: 50.7MB). Peak memory consumption was 89.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: 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, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 138.8s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 38.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 80.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 62 mSDsluCounter, 548 SdHoareTripleChecker+Invalid, 7.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14 IncrementalHoareTripleChecker+Unchecked, 418 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 289 IncrementalHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 130 mSDtfsCounter, 289 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 304 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 33.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=4, InterpolantAutomatonStates: 34, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 101 PreInvPairs, 161 NumberOfFragments, 310 HoareAnnotationTreeSize, 101 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 31 FomulaSimplificationsInter, 628 FormulaSimplificationTreeSizeReductionInter, 80.3s 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: 36]: Loop Invariant Derived loop invariant: ((((y == 0 && a == x) || (((y % z == 0 && (-1 * a + x) / z == a + (-1 * a + x) / z * z) || (!(az == 0) && (-1 * ((-1 * a + x) / z) + a + (-1 * a + x) / z * z) / az * z == y)) && !(z == 0))) && y * az + x == z * x + a) && a * z == az) || ((y == 1 && a == x) && a * z == az) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: 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! [2022-04-06 17:01:30,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...