/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:58:48,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:58:48,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:58:48,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 20:58:48,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:58:48,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:58:48,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:58:48,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 20:58:48,902 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:58:48,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:58:48,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:58:48,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:58:48,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:58:48,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:58:48,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:58:48,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:58:48,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:58:48,904 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:58:48,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:58:48,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:58:48,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:58:48,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:58:48,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:58:48,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:58:48,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:58:48,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:58:48,905 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:58:48,905 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:58:48,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:58:48,906 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:58:48,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:58:49,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:58:49,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:58:49,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:58:49,120 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:58:49,121 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:58:49,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2022-03-20 20:58:49,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62c49a40/fbcf8e0f2ca0423d9aae263b8697d143/FLAGd2eeb0388 [2022-03-20 20:58:49,488 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:58:49,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2022-03-20 20:58:49,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62c49a40/fbcf8e0f2ca0423d9aae263b8697d143/FLAGd2eeb0388 [2022-03-20 20:58:49,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62c49a40/fbcf8e0f2ca0423d9aae263b8697d143 [2022-03-20 20:58:49,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:58:49,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:58:49,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:58:49,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:58:49,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:58:49,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:58:49" (1/1) ... [2022-03-20 20:58:49,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b92c1a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:49, skipping insertion in model container [2022-03-20 20:58:49,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:58:49" (1/1) ... [2022-03-20 20:58:49,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:58:49,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:58:50,089 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/egcd3-ll_valuebound1.c[490,503] [2022-03-20 20:58:50,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:58:50,120 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:58:50,129 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/egcd3-ll_valuebound1.c[490,503] [2022-03-20 20:58:50,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:58:50,151 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:58:50,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:50 WrapperNode [2022-03-20 20:58:50,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:58:50,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:58:50,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:58:50,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:58:50,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:50" (1/1) ... [2022-03-20 20:58:50,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:50" (1/1) ... [2022-03-20 20:58:50,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:50" (1/1) ... [2022-03-20 20:58:50,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:50" (1/1) ... [2022-03-20 20:58:50,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:50" (1/1) ... [2022-03-20 20:58:50,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:50" (1/1) ... [2022-03-20 20:58:50,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:50" (1/1) ... [2022-03-20 20:58:50,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:58:50,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:58:50,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:58:50,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:58:50,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:50" (1/1) ... [2022-03-20 20:58:50,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:58:50,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:50,194 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) [2022-03-20 20:58:50,195 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 [2022-03-20 20:58:50,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:58:50,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:58:50,227 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:58:50,228 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:58:50,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:58:50,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:58:50,228 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:58:50,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:58:50,228 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:58:50,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:58:50,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:58:50,229 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:58:50,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:58:50,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:58:50,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:58:50,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:58:50,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:58:50,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:58:50,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:58:50,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:58:50,280 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:58:50,281 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:58:50,468 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:58:50,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:58:50,479 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 20:58:50,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:58:50 BoogieIcfgContainer [2022-03-20 20:58:50,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:58:50,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:58:50,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:58:50,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:58:50,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:58:49" (1/3) ... [2022-03-20 20:58:50,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0ae8db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:58:50, skipping insertion in model container [2022-03-20 20:58:50,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:50" (2/3) ... [2022-03-20 20:58:50,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0ae8db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:58:50, skipping insertion in model container [2022-03-20 20:58:50,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:58:50" (3/3) ... [2022-03-20 20:58:50,488 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.c [2022-03-20 20:58:50,493 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:58:50,493 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:58:50,533 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:58:50,539 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 [2022-03-20 20:58:50,539 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:58:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:58:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 20:58:50,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:50,571 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:50,572 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-03-20 20:58:50,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:50,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1628460177] [2022-03-20 20:58:50,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:50,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 2 times [2022-03-20 20:58:50,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:50,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225520415] [2022-03-20 20:58:50,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:50,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:50,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:58:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:50,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:58:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:50,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 20:58:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:50,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 20:58:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:50,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 20:58:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 20:58:50,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:50,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225520415] [2022-03-20 20:58:50,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225520415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:50,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:50,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:58:50,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1628460177] [2022-03-20 20:58:50,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1628460177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:50,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:50,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:58:50,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807088244] [2022-03-20 20:58:50,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:50,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:58:50,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:50,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:58:50,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:58:50,825 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:58:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:50,918 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-20 20:58:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:58:50,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 20:58:50,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:50,927 INFO L225 Difference]: With dead ends: 73 [2022-03-20 20:58:50,927 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 20:58:50,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:58:50,934 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:50,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 20:58:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 20:58:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 20:58:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 20:58:50,974 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-20 20:58:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:50,975 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 20:58:50,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:58:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 20:58:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 20:58:50,977 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:50,977 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:50,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:58:50,978 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-03-20 20:58:50,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:50,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [372807153] [2022-03-20 20:58:50,980 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 2 times [2022-03-20 20:58:50,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:50,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29566022] [2022-03-20 20:58:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:50,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:51,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:51,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947441329] [2022-03-20 20:58:51,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:51,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:51,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:51,022 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) [2022-03-20 20:58:51,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 20:58:51,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:58:51,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:51,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 20:58:51,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 20:58:51,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:51,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:51,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29566022] [2022-03-20 20:58:51,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:51,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947441329] [2022-03-20 20:58:51,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947441329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:51,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:51,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:51,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:51,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [372807153] [2022-03-20 20:58:51,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [372807153] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:51,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:51,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:51,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289028240] [2022-03-20 20:58:51,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:51,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:58:51,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:51,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:58:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:58:51,316 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 20:58:51,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:51,405 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 20:58:51,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:58:51,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 20:58:51,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:51,407 INFO L225 Difference]: With dead ends: 54 [2022-03-20 20:58:51,407 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 20:58:51,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:58:51,409 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:51,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:51,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 20:58:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 20:58:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 20:58:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 20:58:51,430 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2022-03-20 20:58:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:51,431 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 20:58:51,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 20:58:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 20:58:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 20:58:51,432 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:51,432 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:51,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:51,639 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 [2022-03-20 20:58:51,640 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:51,640 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-03-20 20:58:51,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:51,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1881667794] [2022-03-20 20:58:51,640 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 2 times [2022-03-20 20:58:51,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:51,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116063548] [2022-03-20 20:58:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:51,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:51,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:51,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968516799] [2022-03-20 20:58:51,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:51,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:51,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:51,653 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) [2022-03-20 20:58:51,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 20:58:51,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:58:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 20:58:51,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 20:58:51,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:51,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116063548] [2022-03-20 20:58:51,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:51,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968516799] [2022-03-20 20:58:51,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968516799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:51,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:51,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:58:51,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:51,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1881667794] [2022-03-20 20:58:51,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1881667794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:51,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:51,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:58:51,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655960972] [2022-03-20 20:58:51,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:51,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:58:51,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:51,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:58:51,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:58:51,902 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:58:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:52,053 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-20 20:58:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:58:52,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 20:58:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:52,055 INFO L225 Difference]: With dead ends: 103 [2022-03-20 20:58:52,055 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 20:58:52,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:58:52,056 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:52,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 288 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 20:58:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-20 20:58:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 20:58:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-20 20:58:52,071 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-20 20:58:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:52,071 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-20 20:58:52,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:58:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-20 20:58:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 20:58:52,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:52,072 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:52,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:52,279 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 [2022-03-20 20:58:52,280 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-03-20 20:58:52,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [359582101] [2022-03-20 20:58:52,281 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:52,281 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 2 times [2022-03-20 20:58:52,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:52,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257548334] [2022-03-20 20:58:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:52,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:52,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:52,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758667201] [2022-03-20 20:58:52,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:52,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:52,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:52,293 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) [2022-03-20 20:58:52,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 20:58:52,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:52,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 20:58:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 20:58:52,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 20:58:52,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:52,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257548334] [2022-03-20 20:58:52,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:52,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758667201] [2022-03-20 20:58:52,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758667201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:52,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:52,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-03-20 20:58:52,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:52,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [359582101] [2022-03-20 20:58:52,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [359582101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:52,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:52,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:58:52,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330899273] [2022-03-20 20:58:52,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:52,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:58:52,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:52,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:58:52,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:58:52,596 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 20:58:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:52,692 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-03-20 20:58:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:58:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-03-20 20:58:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:52,694 INFO L225 Difference]: With dead ends: 98 [2022-03-20 20:58:52,694 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 20:58:52,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:58:52,695 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:52,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 208 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 20:58:52,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2022-03-20 20:58:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 20:58:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-03-20 20:58:52,704 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 42 [2022-03-20 20:58:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:52,704 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-03-20 20:58:52,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 20:58:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-03-20 20:58:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 20:58:52,705 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:52,705 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:52,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:52,915 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 [2022-03-20 20:58:52,916 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-03-20 20:58:52,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:52,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [664107688] [2022-03-20 20:58:52,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 2 times [2022-03-20 20:58:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:52,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067582025] [2022-03-20 20:58:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:52,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:52,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588693903] [2022-03-20 20:58:52,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:52,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:52,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:52,927 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) [2022-03-20 20:58:52,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 20:58:52,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:52,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 20:58:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 20:58:53,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:53,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067582025] [2022-03-20 20:58:53,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588693903] [2022-03-20 20:58:53,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588693903] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:58:53,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:58:53,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 20:58:53,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:53,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [664107688] [2022-03-20 20:58:53,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [664107688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:53,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:53,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:53,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662322832] [2022-03-20 20:58:53,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:53,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:53,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:58:53,199 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:58:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:53,238 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2022-03-20 20:58:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:58:53,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-20 20:58:53,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:53,240 INFO L225 Difference]: With dead ends: 75 [2022-03-20 20:58:53,240 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 20:58:53,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:58:53,240 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:53,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 20:58:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-03-20 20:58:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 20:58:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2022-03-20 20:58:53,252 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 47 [2022-03-20 20:58:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:53,253 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2022-03-20 20:58:53,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:58:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2022-03-20 20:58:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 20:58:53,254 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:53,254 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:53,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:53,466 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 [2022-03-20 20:58:53,467 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-03-20 20:58:53,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:53,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987014263] [2022-03-20 20:58:53,468 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 2 times [2022-03-20 20:58:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:53,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045927244] [2022-03-20 20:58:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:53,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:53,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427417032] [2022-03-20 20:58:53,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:53,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:53,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:53,482 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) [2022-03-20 20:58:53,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 20:58:53,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:53,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:53,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 20:58:53,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 20:58:53,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 20:58:53,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:53,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045927244] [2022-03-20 20:58:53,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:53,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427417032] [2022-03-20 20:58:53,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427417032] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:58:53,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:58:53,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2022-03-20 20:58:53,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:53,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987014263] [2022-03-20 20:58:53,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987014263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:53,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:53,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:53,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433091488] [2022-03-20 20:58:53,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:53,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:53,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:53,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:53,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:58:53,840 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:58:53,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:53,875 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-03-20 20:58:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:58:53,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-20 20:58:53,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:53,877 INFO L225 Difference]: With dead ends: 77 [2022-03-20 20:58:53,877 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 20:58:53,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:58:53,879 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:53,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:53,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 20:58:53,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-03-20 20:58:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 20:58:53,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-03-20 20:58:53,898 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 52 [2022-03-20 20:58:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:53,899 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-03-20 20:58:53,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:58:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-03-20 20:58:53,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 20:58:53,900 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:53,900 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:53,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:54,115 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 [2022-03-20 20:58:54,115 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-03-20 20:58:54,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:54,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [305602249] [2022-03-20 20:58:54,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 2 times [2022-03-20 20:58:54,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:54,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957915026] [2022-03-20 20:58:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:54,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:54,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:54,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217095126] [2022-03-20 20:58:54,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:54,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:54,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:54,130 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) [2022-03-20 20:58:54,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 20:58:54,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:54,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:54,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 20:58:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 20:58:54,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 20:58:57,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957915026] [2022-03-20 20:58:57,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217095126] [2022-03-20 20:58:57,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217095126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:57,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:57,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2022-03-20 20:58:57,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:57,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [305602249] [2022-03-20 20:58:57,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [305602249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:57,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:57,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:58:57,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940070675] [2022-03-20 20:58:57,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:57,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:58:57,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:58:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-20 20:58:57,671 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 20:58:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:58,199 INFO L93 Difference]: Finished difference Result 124 states and 169 transitions. [2022-03-20 20:58:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:58:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 64 [2022-03-20 20:58:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:58,200 INFO L225 Difference]: With dead ends: 124 [2022-03-20 20:58:58,200 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 20:58:58,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 20:58:58,201 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 81 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:58,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 387 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:58:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 20:58:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2022-03-20 20:58:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 20:58:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 150 transitions. [2022-03-20 20:58:58,225 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 150 transitions. Word has length 64 [2022-03-20 20:58:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:58,226 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 150 transitions. [2022-03-20 20:58:58,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 20:58:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 150 transitions. [2022-03-20 20:58:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 20:58:58,226 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:58,227 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:58,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:58,437 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 [2022-03-20 20:58:58,438 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1914971202, now seen corresponding path program 3 times [2022-03-20 20:58:58,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:58,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806231146] [2022-03-20 20:58:58,438 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:58,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1914971202, now seen corresponding path program 4 times [2022-03-20 20:58:58,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:58,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434589987] [2022-03-20 20:58:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:58,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:58,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:58,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146185918] [2022-03-20 20:58:58,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:58,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:58,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:58,448 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) [2022-03-20 20:58:58,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 20:58:58,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:58,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:58,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:58:58,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 20:58:58,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 20:58:58,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:58,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434589987] [2022-03-20 20:58:58,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:58,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146185918] [2022-03-20 20:58:58,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146185918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:58,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:58,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 20:58:58,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:58,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806231146] [2022-03-20 20:58:58,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806231146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:58,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:58,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:58:58,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261900776] [2022-03-20 20:58:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:58,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:58:58,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:58,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:58:58,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:58:58,708 INFO L87 Difference]: Start difference. First operand 111 states and 150 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:58:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:58,860 INFO L93 Difference]: Finished difference Result 227 states and 315 transitions. [2022-03-20 20:58:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:58:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2022-03-20 20:58:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:58,864 INFO L225 Difference]: With dead ends: 227 [2022-03-20 20:58:58,864 INFO L226 Difference]: Without dead ends: 162 [2022-03-20 20:58:58,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:58:58,866 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 31 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:58,866 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 234 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-20 20:58:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 144. [2022-03-20 20:58:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 80 states have (on average 1.2125) internal successors, (97), 81 states have internal predecessors, (97), 55 states have call successors, (55), 9 states have call predecessors, (55), 8 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 20:58:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 205 transitions. [2022-03-20 20:58:58,892 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 205 transitions. Word has length 69 [2022-03-20 20:58:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:58,892 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 205 transitions. [2022-03-20 20:58:58,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:58:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 205 transitions. [2022-03-20 20:58:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 20:58:58,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:58,895 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:58,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:59,103 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 [2022-03-20 20:58:59,103 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1205081507, now seen corresponding path program 1 times [2022-03-20 20:58:59,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:59,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [434478295] [2022-03-20 20:58:59,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1205081507, now seen corresponding path program 2 times [2022-03-20 20:58:59,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:59,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359079418] [2022-03-20 20:58:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:59,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:59,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:59,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103746294] [2022-03-20 20:58:59,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:59,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:59,117 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) [2022-03-20 20:58:59,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 20:58:59,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:59,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:59,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 20:58:59,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 20:58:59,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 20:58:59,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:59,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359079418] [2022-03-20 20:58:59,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:59,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103746294] [2022-03-20 20:58:59,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103746294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:59,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:59,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-03-20 20:58:59,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:59,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [434478295] [2022-03-20 20:58:59,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [434478295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:59,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:59,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:58:59,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180277515] [2022-03-20 20:58:59,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:59,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:58:59,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:58:59,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:58:59,572 INFO L87 Difference]: Start difference. First operand 144 states and 205 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:58:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:59,737 INFO L93 Difference]: Finished difference Result 202 states and 283 transitions. [2022-03-20 20:58:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:58:59,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 72 [2022-03-20 20:58:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:59,739 INFO L225 Difference]: With dead ends: 202 [2022-03-20 20:58:59,739 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 20:58:59,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:58:59,741 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:59,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 312 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 20:58:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-03-20 20:58:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.171875) internal successors, (75), 65 states have internal predecessors, (75), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 20:58:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2022-03-20 20:58:59,759 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 72 [2022-03-20 20:58:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:59,761 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2022-03-20 20:58:59,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:58:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2022-03-20 20:58:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 20:58:59,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:59,762 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:59,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:59,975 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 [2022-03-20 20:58:59,975 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:59,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2022-03-20 20:58:59,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:59,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1241527131] [2022-03-20 20:58:59,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:59,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 2 times [2022-03-20 20:58:59,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:59,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618643603] [2022-03-20 20:58:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:59,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:59,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:59,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107446880] [2022-03-20 20:58:59,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:59,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:59,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:59,985 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:59,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 20:59:00,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:00,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:00,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 20:59:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-03-20 20:59:00,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-03-20 20:59:00,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618643603] [2022-03-20 20:59:00,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107446880] [2022-03-20 20:59:00,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107446880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:00,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:00,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 20:59:00,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1241527131] [2022-03-20 20:59:00,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1241527131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:00,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:00,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:59:00,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423825007] [2022-03-20 20:59:00,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:00,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:59:00,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:00,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:59:00,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:59:00,493 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 20:59:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:00,681 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2022-03-20 20:59:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:59:00,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-03-20 20:59:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:00,682 INFO L225 Difference]: With dead ends: 127 [2022-03-20 20:59:00,682 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 20:59:00,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:59:00,683 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:00,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 197 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 20:59:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 20:59:00,684 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) [2022-03-20 20:59:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 20:59:00,684 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-03-20 20:59:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:00,684 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 20:59:00,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 20:59:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 20:59:00,684 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 20:59:00,686 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 20:59:00,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 20:59:00,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 20:59:00,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 20:59:02,375 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2022-03-20 20:59:02,376 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2022-03-20 20:59:02,376 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2022-03-20 20:59:02,376 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-03-20 20:59:02,376 INFO L878 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 20:59:02,376 INFO L878 garLoopResultBuilder]: At program point L8-2(lines 7 9) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 20:59:02,376 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 7 9) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 20:59:02,376 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 1))) (or (and (= (+ main_~s~0 main_~r~0) 0) (< main_~c~0 1) (= (+ main_~q~0 main_~p~0) 1) (< main_~b~0 1) (= main_~p~0 0) .cse0 (= main_~r~0 1) (= main_~a~0 main_~y~0) (<= main_~a~0 main_~x~0) (<= 0 main_~c~0) (< (div (+ (- 1) (* (- 1) main_~a~0)) (- 2)) (+ main_~a~0 1)) (<= 0 main_~b~0)) (and (<= 0 main_~y~0) (= main_~r~0 0) (= main_~s~0 1) .cse0 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (<= main_~y~0 1) (= main_~p~0 1)))) [2022-03-20 20:59:02,376 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (or (and (= main_~r~0 0) (= main_~s~0 1) (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0) (= main_~p~0 1)) (and (= (+ main_~s~0 main_~r~0) 0) (<= 1 main_~x~0) (= (+ main_~q~0 main_~p~0) 1) (= main_~p~0 0) (<= main_~x~0 1) (= main_~r~0 1) (= main_~a~0 main_~y~0) (< (div (+ (- 1) (* (- 1) main_~a~0)) (- 2)) (+ main_~a~0 1)) (<= main_~y~0 1))) [2022-03-20 20:59:02,376 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 18 76) the Hoare annotation is: true [2022-03-20 20:59:02,376 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (<= 0 main_~y~0)) (.cse1 (= main_~r~0 0)) (.cse2 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse3 (= main_~k~0 0)) (.cse4 (= main_~s~0 1)) (.cse5 (<= 1 main_~a~0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse7 (= main_~q~0 0)) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~c~0 1)) (.cse10 (= main_~p~0 1))) (or (and (= main_~v~0 (* main_~d~0 main_~b~0)) .cse0 .cse1 .cse2 .cse3 .cse4 (<= main_~b~0 (div main_~c~0 2)) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 (<= main_~v~0 main_~b~0) .cse2 .cse3 .cse4 .cse5 .cse6 (<= main_~b~0 main_~v~0) (= main_~d~0 1) .cse7 .cse8 .cse9 (<= main_~y~0 1) .cse10))) [2022-03-20 20:59:02,376 INFO L878 garLoopResultBuilder]: At program point L36(lines 36 37) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 1))) (or (and (= (+ main_~s~0 main_~r~0) 0) (< main_~c~0 1) (= (+ main_~q~0 main_~p~0) 1) (< main_~b~0 1) (= main_~p~0 0) .cse0 (= main_~r~0 1) (= main_~a~0 main_~y~0) (<= main_~a~0 main_~x~0) (<= 0 main_~c~0) (< (div (+ (- 1) (* (- 1) main_~a~0)) (- 2)) (+ main_~a~0 1)) (<= 0 main_~b~0)) (and (<= 0 main_~y~0) (= main_~r~0 0) (= main_~s~0 1) .cse0 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (<= main_~y~0 1) (= main_~p~0 1)))) [2022-03-20 20:59:02,376 INFO L878 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2022-03-20 20:59:02,376 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 0 main_~x~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2022-03-20 20:59:02,377 INFO L878 garLoopResultBuilder]: At program point L53(lines 49 59) the Hoare annotation is: (let ((.cse0 (<= 0 main_~y~0)) (.cse1 (= main_~r~0 0)) (.cse2 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse3 (= main_~k~0 0)) (.cse4 (= main_~s~0 1)) (.cse5 (<= 1 main_~a~0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse7 (= main_~q~0 0)) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~c~0 1)) (.cse10 (= main_~p~0 1))) (or (and (= main_~v~0 (* main_~d~0 main_~b~0)) .cse0 .cse1 .cse2 .cse3 .cse4 (<= main_~b~0 (div main_~c~0 2)) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 (<= main_~v~0 main_~b~0) .cse2 .cse3 .cse4 .cse5 .cse6 (<= main_~b~0 main_~v~0) (= main_~d~0 1) .cse7 .cse8 .cse9 (<= main_~y~0 1) .cse10))) [2022-03-20 20:59:02,377 INFO L878 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse0 (<= 0 main_~y~0)) (.cse1 (= main_~r~0 0)) (.cse2 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse3 (= main_~k~0 0)) (.cse4 (= main_~s~0 1)) (.cse5 (<= 1 main_~a~0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse7 (= main_~q~0 0)) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~c~0 1)) (.cse10 (= main_~p~0 1))) (or (and (= main_~v~0 (* main_~d~0 main_~b~0)) .cse0 .cse1 .cse2 .cse3 .cse4 (<= main_~b~0 (div main_~c~0 2)) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 (<= main_~v~0 main_~b~0) .cse2 .cse3 .cse4 .cse5 .cse6 (<= main_~b~0 main_~v~0) (= main_~d~0 1) .cse7 .cse8 .cse9 (<= main_~y~0 1) .cse10))) [2022-03-20 20:59:02,377 INFO L878 garLoopResultBuilder]: At program point L49-3(lines 49 59) the Hoare annotation is: (and (= main_~r~0 0) (<= main_~c~0 main_~x~0) (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (<= main_~x~0 1) (= main_~b~0 main_~y~0) (= main_~d~0 1) (= main_~q~0 0) (not (<= (* main_~v~0 2) main_~c~0)) (= main_~a~0 main_~x~0) (< (div (+ (- 1) (* (- 1) main_~b~0)) (- 2)) (+ main_~b~0 1)) (<= main_~y~0 1) (= main_~p~0 1)) [2022-03-20 20:59:02,377 INFO L885 garLoopResultBuilder]: At program point L74(line 74) the Hoare annotation is: true [2022-03-20 20:59:02,377 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2022-03-20 20:59:02,377 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (<= 0 main_~y~0)) (.cse1 (= main_~r~0 0)) (.cse2 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse3 (= main_~k~0 0)) (.cse4 (= main_~s~0 1)) (.cse5 (<= 1 main_~a~0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse7 (= main_~q~0 0)) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~c~0 1)) (.cse10 (= main_~p~0 1))) (or (and (= main_~v~0 (* main_~d~0 main_~b~0)) .cse0 .cse1 .cse2 .cse3 .cse4 (<= main_~b~0 (div main_~c~0 2)) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 (<= main_~v~0 main_~b~0) .cse2 .cse3 .cse4 .cse5 .cse6 (<= main_~b~0 main_~v~0) (= main_~d~0 1) .cse7 .cse8 .cse9 (<= main_~y~0 1) .cse10))) [2022-03-20 20:59:02,378 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse0 (<= 0 main_~y~0)) (.cse1 (= main_~r~0 0)) (.cse2 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse3 (= main_~k~0 0)) (.cse4 (= main_~s~0 1)) (.cse5 (<= 1 main_~a~0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse7 (= main_~q~0 0)) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~c~0 1)) (.cse10 (= main_~p~0 1))) (or (and (= main_~v~0 (* main_~d~0 main_~b~0)) .cse0 .cse1 .cse2 .cse3 .cse4 (<= main_~b~0 (div main_~c~0 2)) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 (<= main_~v~0 main_~b~0) .cse2 .cse3 .cse4 .cse5 .cse6 (<= main_~b~0 main_~v~0) (= main_~d~0 1) .cse7 .cse8 .cse9 (<= main_~y~0 1) .cse10))) [2022-03-20 20:59:02,378 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 18 76) the Hoare annotation is: true [2022-03-20 20:59:02,378 INFO L878 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse0 (= main_~r~0 0)) (.cse1 (= main_~s~0 1)) (.cse2 (<= main_~x~0 1)) (.cse3 (<= 1 main_~a~0)) (.cse4 (= main_~b~0 main_~y~0)) (.cse5 (= main_~q~0 0)) (.cse6 (= main_~a~0 main_~x~0)) (.cse7 (<= main_~y~0 1)) (.cse8 (= main_~p~0 1))) (or (and (<= 0 main_~y~0) .cse0 (<= 1 main_~c~0) (= main_~k~0 0) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (<= main_~c~0 1) .cse7 .cse8) (and (= main_~v~0 (* main_~d~0 main_~b~0)) .cse0 (<= main_~v~0 main_~b~0) .cse1 .cse2 .cse3 (<= 0 main_~c~0) .cse4 (= main_~k~0 1) .cse5 (< main_~c~0 main_~b~0) .cse6 .cse7 .cse8))) [2022-03-20 20:59:02,378 INFO L878 garLoopResultBuilder]: At program point L42-3(lines 42 62) the Hoare annotation is: (and (= main_~r~0 0) (<= main_~v~0 main_~b~0) (<= main_~b~0 main_~x~0) (= main_~s~0 1) (<= main_~x~0 1) (<= main_~a~0 main_~x~0) (<= 0 main_~c~0) (= main_~b~0 main_~y~0) (= main_~k~0 1) (= main_~q~0 0) (< main_~c~0 main_~b~0) (= main_~p~0 1)) [2022-03-20 20:59:02,378 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2022-03-20 20:59:02,378 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2022-03-20 20:59:02,378 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-03-20 20:59:02,378 INFO L878 garLoopResultBuilder]: At program point L22-1(line 22) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2022-03-20 20:59:02,378 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (<= 0 main_~y~0)) (.cse1 (= main_~r~0 0)) (.cse2 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse3 (= main_~k~0 0)) (.cse4 (= main_~s~0 1)) (.cse5 (<= 1 main_~a~0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse7 (= main_~q~0 0)) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~c~0 1)) (.cse10 (= main_~p~0 1))) (or (and (= main_~v~0 (* main_~d~0 main_~b~0)) .cse0 .cse1 .cse2 .cse3 .cse4 (<= main_~b~0 (div main_~c~0 2)) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 (<= main_~v~0 main_~b~0) .cse2 .cse3 .cse4 .cse5 .cse6 (<= main_~b~0 main_~v~0) (= main_~d~0 1) .cse7 .cse8 .cse9 (<= main_~y~0 1) .cse10))) [2022-03-20 20:59:02,378 INFO L878 garLoopResultBuilder]: At program point L43(lines 43 44) the Hoare annotation is: (let ((.cse0 (= main_~r~0 0)) (.cse1 (= main_~s~0 1)) (.cse2 (<= main_~x~0 1)) (.cse3 (<= 1 main_~a~0)) (.cse4 (= main_~b~0 main_~y~0)) (.cse5 (= main_~q~0 0)) (.cse6 (= main_~a~0 main_~x~0)) (.cse7 (<= main_~y~0 1)) (.cse8 (= main_~p~0 1))) (or (and (<= 0 main_~y~0) .cse0 (<= 1 main_~c~0) (= main_~k~0 0) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (<= main_~c~0 1) .cse7 .cse8) (and (= main_~v~0 (* main_~d~0 main_~b~0)) .cse0 (<= main_~v~0 main_~b~0) .cse1 .cse2 .cse3 (<= 0 main_~c~0) .cse4 (= main_~k~0 1) .cse5 (< main_~c~0 main_~b~0) .cse6 .cse7 .cse8))) [2022-03-20 20:59:02,378 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 20:59:02,378 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|)) [2022-03-20 20:59:02,378 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 20:59:02,378 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 20:59:02,378 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 20:59:02,378 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 20:59:02,378 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 20:59:02,378 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-03-20 20:59:02,378 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 13) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 20:59:02,379 INFO L878 garLoopResultBuilder]: At program point L11(lines 11 14) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 20:59:02,379 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 10 16) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 20:59:02,379 INFO L878 garLoopResultBuilder]: At program point L11-2(lines 10 16) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 20:59:02,379 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 20:59:02,381 INFO L719 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-20 20:59:02,381 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 20:59:02,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:59:02 BoogieIcfgContainer [2022-03-20 20:59:02,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 20:59:02,393 INFO L158 Benchmark]: Toolchain (without parser) took 12447.58ms. Allocated memory was 202.4MB in the beginning and 310.4MB in the end (delta: 108.0MB). Free memory was 152.1MB in the beginning and 157.6MB in the end (delta: -5.5MB). Peak memory consumption was 124.2MB. Max. memory is 8.0GB. [2022-03-20 20:59:02,393 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 202.4MB. Free memory was 168.1MB in the beginning and 167.9MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 20:59:02,393 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.66ms. Allocated memory is still 202.4MB. Free memory was 151.9MB in the beginning and 178.1MB in the end (delta: -26.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 20:59:02,393 INFO L158 Benchmark]: Boogie Preprocessor took 19.44ms. Allocated memory is still 202.4MB. Free memory was 178.1MB in the beginning and 176.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 20:59:02,393 INFO L158 Benchmark]: RCFGBuilder took 307.64ms. Allocated memory is still 202.4MB. Free memory was 176.4MB in the beginning and 164.5MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 20:59:02,394 INFO L158 Benchmark]: TraceAbstraction took 11911.67ms. Allocated memory was 202.4MB in the beginning and 310.4MB in the end (delta: 108.0MB). Free memory was 163.9MB in the beginning and 157.6MB in the end (delta: 6.3MB). Peak memory consumption was 135.6MB. Max. memory is 8.0GB. [2022-03-20 20:59:02,394 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 202.4MB. Free memory was 168.1MB in the beginning and 167.9MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.66ms. Allocated memory is still 202.4MB. Free memory was 151.9MB in the beginning and 178.1MB in the end (delta: -26.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.44ms. Allocated memory is still 202.4MB. Free memory was 178.1MB in the beginning and 176.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 307.64ms. Allocated memory is still 202.4MB. Free memory was 176.4MB in the beginning and 164.5MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 11911.67ms. Allocated memory was 202.4MB in the beginning and 310.4MB in the end (delta: 108.0MB). Free memory was 163.9MB in the beginning and 157.6MB in the end (delta: 6.3MB). Peak memory consumption was 135.6MB. 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: 13]: 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, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.9s, OverallIterations: 10, TraceHistogramMax: 9, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 371 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 325 mSDsluCounter, 2161 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1713 mSDsCounter, 229 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1234 IncrementalHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 229 mSolverCounterUnsat, 448 mSDtfsCounter, 1234 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1027 GetRequests, 877 SyntacticMatches, 6 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=8, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 68 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 40 LocationsWithAnnotation, 658 PreInvPairs, 740 NumberOfFragments, 1206 HoareAnnotationTreeSize, 658 FomulaSimplifications, 84 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 40 FomulaSimplificationsInter, 2774 FormulaSimplificationTreeSizeReductionInter, 1.3s 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: 49]: Loop Invariant Derived loop invariant: ((((((((((((v == d * b && 0 <= y) && r == 0) && a == c + b * k) && k == 0) && s == 1) && b <= c / 2) && 1 <= a) && b == y) && q == 0) && a == x) && c <= 1) && p == 1) || ((((((((((((((0 <= y && r == 0) && v <= b) && a == c + b * k) && k == 0) && s == 1) && 1 <= a) && b == y) && b <= v) && d == 1) && q == 0) && a == x) && c <= 1) && y <= 1) && p == 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((((s + r == 0 && c < 1) && q + p == 1) && b < 1) && p == 0) && x <= 1) && r == 1) && a == y) && a <= x) && 0 <= c) && (-1 + -1 * a) / -2 < a + 1) && 0 <= b) || (((((((((0 <= y && r == 0) && s == 1) && x <= 1) && 1 <= a) && b == y) && q == 0) && a == x) && y <= 1) && p == 1) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((0 <= y && r == 0) && 1 <= c) && k == 0) && s == 1) && x <= 1) && 1 <= a) && b == y) && q == 0) && a == x) && c <= 1) && y <= 1) && p == 1) || (((((((((((((v == d * b && r == 0) && v <= b) && s == 1) && x <= 1) && 1 <= a) && 0 <= c) && b == y) && k == 1) && q == 0) && c < b) && a == x) && y <= 1) && p == 1) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 18]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 10]: 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! [2022-03-20 20:59:02,416 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...