/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 15:27:35,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 15:27:35,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 15:27:36,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 15:27:36,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 15:27:36,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 15:27:36,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 15:27:36,087 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 15:27:36,095 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 15:27:36,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 15:27:36,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 15:27:36,097 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 15:27:36,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 15:27:36,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 15:27:36,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 15:27:36,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 15:27:36,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 15:27:36,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 15:27:36,098 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 15:27:36,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 15:27:36,099 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 15:27:36,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 15:27:36,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 15:27:36,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 15:27:36,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 15:27:36,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 15:27:36,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:27:36,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 15:27:36,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 15:27:36,100 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 15:27:36,100 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 15:27:36,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 15:27:36,100 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 15:27:36,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 15:27:36,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 15:27:36,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 15:27:36,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 15:27:36,335 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 15:27:36,336 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 15:27:36,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2022-03-20 15:27:36,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0511625a/9b5e226119714d128658479ad39cd12e/FLAG305b59e99 [2022-03-20 15:27:36,728 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 15:27:36,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2022-03-20 15:27:36,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0511625a/9b5e226119714d128658479ad39cd12e/FLAG305b59e99 [2022-03-20 15:27:36,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0511625a/9b5e226119714d128658479ad39cd12e [2022-03-20 15:27:36,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 15:27:36,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 15:27:36,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 15:27:36,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 15:27:36,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 15:27:36,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:27:36" (1/1) ... [2022-03-20 15:27:36,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6ec344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36, skipping insertion in model container [2022-03-20 15:27:36,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:27:36" (1/1) ... [2022-03-20 15:27:36,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 15:27:36,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 15:27:36,877 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/hard-ll_valuebound5.c[538,551] [2022-03-20 15:27:36,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:27:36,913 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 15:27:36,920 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/hard-ll_valuebound5.c[538,551] [2022-03-20 15:27:36,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:27:36,938 INFO L208 MainTranslator]: Completed translation [2022-03-20 15:27:36,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36 WrapperNode [2022-03-20 15:27:36,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 15:27:36,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 15:27:36,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 15:27:36,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 15:27:36,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36" (1/1) ... [2022-03-20 15:27:36,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36" (1/1) ... [2022-03-20 15:27:36,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36" (1/1) ... [2022-03-20 15:27:36,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36" (1/1) ... [2022-03-20 15:27:36,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36" (1/1) ... [2022-03-20 15:27:36,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36" (1/1) ... [2022-03-20 15:27:36,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36" (1/1) ... [2022-03-20 15:27:36,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 15:27:36,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 15:27:36,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 15:27:36,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 15:27:36,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36" (1/1) ... [2022-03-20 15:27:36,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:27:36,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:36,998 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 15:27:37,039 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 15:27:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 15:27:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 15:27:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 15:27:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 15:27:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 15:27:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 15:27:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 15:27:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 15:27:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 15:27:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 15:27:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 15:27:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 15:27:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 15:27:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 15:27:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 15:27:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 15:27:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 15:27:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 15:27:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 15:27:37,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 15:27:37,105 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 15:27:37,107 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 15:27:37,191 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 15:27:37,195 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 15:27:37,195 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 15:27:37,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:27:37 BoogieIcfgContainer [2022-03-20 15:27:37,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 15:27:37,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 15:27:37,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 15:27:37,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 15:27:37,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:27:36" (1/3) ... [2022-03-20 15:27:37,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c22432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:27:37, skipping insertion in model container [2022-03-20 15:27:37,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:36" (2/3) ... [2022-03-20 15:27:37,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c22432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:27:37, skipping insertion in model container [2022-03-20 15:27:37,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:27:37" (3/3) ... [2022-03-20 15:27:37,201 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2022-03-20 15:27:37,204 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 15:27:37,204 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 15:27:37,235 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 15:27:37,243 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 15:27:37,243 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 15:27:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 15:27:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 15:27:37,267 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:37,267 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:37,268 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-20 15:27:37,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:37,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [175144754] [2022-03-20 15:27:37,287 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:37,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-03-20 15:27:37,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:37,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937213554] [2022-03-20 15:27:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:37,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:37,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:27:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:37,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:27:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:37,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:27:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:37,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:27:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:27:37,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:37,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937213554] [2022-03-20 15:27:37,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937213554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:37,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:37,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:27:37,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:37,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [175144754] [2022-03-20 15:27:37,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [175144754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:37,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:37,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:27:37,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601917249] [2022-03-20 15:27:37,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:37,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 15:27:37,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 15:27:37,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:27:37,518 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 15:27:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:37,610 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-20 15:27:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 15:27:37,612 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 15:27:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:37,617 INFO L225 Difference]: With dead ends: 69 [2022-03-20 15:27:37,617 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 15:27:37,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:27:37,621 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:37,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 15:27:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 15:27:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:27:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 15:27:37,659 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-20 15:27:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:37,659 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 15:27:37,660 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 15:27:37,660 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 15:27:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 15:27:37,661 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:37,662 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:37,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 15:27:37,662 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-20 15:27:37,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:37,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205297463] [2022-03-20 15:27:37,668 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-03-20 15:27:37,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:37,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185252693] [2022-03-20 15:27:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:37,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:37,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:27:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:37,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:27:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:37,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:27:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:37,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:27:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:27:37,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:37,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185252693] [2022-03-20 15:27:37,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185252693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:37,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:37,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:37,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:37,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205297463] [2022-03-20 15:27:37,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205297463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:37,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:37,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050683273] [2022-03-20 15:27:37,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:37,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:27:37,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:37,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:27:37,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:37,771 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:27:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:37,949 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 15:27:37,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:27:37,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 15:27:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:37,950 INFO L225 Difference]: With dead ends: 46 [2022-03-20 15:27:37,951 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 15:27:37,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:27:37,952 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:37,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 15:27:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 15:27:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:27:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 15:27:37,962 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-20 15:27:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:37,962 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 15:27:37,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:27:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 15:27:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 15:27:37,963 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:37,963 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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 15:27:37,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 15:27:37,963 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-20 15:27:37,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:37,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1106471633] [2022-03-20 15:27:37,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-03-20 15:27:37,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:37,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032291620] [2022-03-20 15:27:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:37,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:38,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:27:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:38,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:27:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:38,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:27:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:38,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:27:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:38,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 15:27:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:27:38,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:38,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032291620] [2022-03-20 15:27:38,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032291620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:38,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:38,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:38,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:38,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1106471633] [2022-03-20 15:27:38,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1106471633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:38,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:38,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027087553] [2022-03-20 15:27:38,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:38,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:27:38,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:27:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:38,114 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:27:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:38,252 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-20 15:27:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:27:38,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 15:27:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:38,253 INFO L225 Difference]: With dead ends: 50 [2022-03-20 15:27:38,253 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 15:27:38,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:27:38,254 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:38,255 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:38,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 15:27:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-20 15:27:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:27:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 15:27:38,262 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-20 15:27:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:38,262 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 15:27:38,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:27:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 15:27:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 15:27:38,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:38,263 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-03-20 15:27:38,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 15:27:38,264 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-20 15:27:38,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:38,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1986417740] [2022-03-20 15:27:38,265 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-03-20 15:27:38,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:38,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156568528] [2022-03-20 15:27:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:38,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:38,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:38,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952981304] [2022-03-20 15:27:38,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:38,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:38,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:38,301 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 15:27:38,302 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 15:27:38,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:38,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:38,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:27:38,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 15:27:38,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:27:38,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156568528] [2022-03-20 15:27:38,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952981304] [2022-03-20 15:27:38,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952981304] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:38,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:38,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:38,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:38,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1986417740] [2022-03-20 15:27:38,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1986417740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:38,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:38,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:38,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764403651] [2022-03-20 15:27:38,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:38,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:27:38,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:38,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:27:38,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:27:38,456 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 15:27:38,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:38,518 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-20 15:27:38,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:38,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-20 15:27:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:38,520 INFO L225 Difference]: With dead ends: 69 [2022-03-20 15:27:38,521 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 15:27:38,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:38,535 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:38,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:27:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 15:27:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 15:27:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 15:27:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 15:27:38,545 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-20 15:27:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:38,545 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 15:27:38,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 15:27:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 15:27:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 15:27:38,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:38,546 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2022-03-20 15:27:38,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 15:27:38,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:38,759 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-20 15:27:38,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:38,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1317133249] [2022-03-20 15:27:38,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-03-20 15:27:38,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:38,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335294949] [2022-03-20 15:27:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:38,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:38,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:38,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172690055] [2022-03-20 15:27:38,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:38,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:38,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:38,775 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 15:27:38,777 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 15:27:38,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:38,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:38,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 15:27:38,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 15:27:39,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:27:39,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:39,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335294949] [2022-03-20 15:27:39,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:39,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172690055] [2022-03-20 15:27:39,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172690055] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:27:39,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:27:39,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 15:27:39,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:39,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1317133249] [2022-03-20 15:27:39,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1317133249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:39,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:39,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380357396] [2022-03-20 15:27:39,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:39,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:27:39,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:27:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:27:39,262 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 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 15:27:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:39,315 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-20 15:27:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 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 45 [2022-03-20 15:27:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:39,318 INFO L225 Difference]: With dead ends: 68 [2022-03-20 15:27:39,318 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 15:27:39,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:27:39,323 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:39,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:27:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 15:27:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 15:27:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 15:27:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-20 15:27:39,341 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-20 15:27:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:39,341 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-20 15:27:39,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 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 15:27:39,341 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-20 15:27:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 15:27:39,342 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:39,342 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:39,365 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 15:27:39,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:39,565 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-20 15:27:39,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:39,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1929052126] [2022-03-20 15:27:39,567 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-03-20 15:27:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:39,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926309510] [2022-03-20 15:27:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:39,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:39,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:39,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753251612] [2022-03-20 15:27:39,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:39,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:39,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:39,598 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 15:27:39,622 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 15:27:39,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:39,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:39,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 15:27:39,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 15:27:39,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 15:27:40,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:40,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926309510] [2022-03-20 15:27:40,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:40,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753251612] [2022-03-20 15:27:40,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753251612] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:27:40,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:27:40,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 15:27:40,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:40,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1929052126] [2022-03-20 15:27:40,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1929052126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:40,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:40,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:40,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343471093] [2022-03-20 15:27:40,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:40,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:27:40,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:27:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:27:40,006 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 15:27:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:40,148 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-20 15:27:40,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:40,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 55 [2022-03-20 15:27:40,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:40,149 INFO L225 Difference]: With dead ends: 76 [2022-03-20 15:27:40,149 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 15:27:40,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:27:40,150 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:40,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 15:27:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-20 15:27:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 15:27:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-20 15:27:40,159 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-20 15:27:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:40,159 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-20 15:27:40,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 15:27:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-20 15:27:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 15:27:40,160 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:40,160 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 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, 1] [2022-03-20 15:27:40,193 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 15:27:40,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:40,379 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-20 15:27:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:40,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265991535] [2022-03-20 15:27:40,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-03-20 15:27:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:40,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475391070] [2022-03-20 15:27:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:40,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:40,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752610895] [2022-03-20 15:27:40,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:40,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:40,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:40,408 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 15:27:40,420 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 15:27:40,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:40,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:40,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:27:40,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 15:27:40,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:27:40,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:40,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475391070] [2022-03-20 15:27:40,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:40,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752610895] [2022-03-20 15:27:40,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752610895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:40,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:40,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:40,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:40,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265991535] [2022-03-20 15:27:40,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265991535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:40,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:40,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:40,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572484884] [2022-03-20 15:27:40,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:40,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:27:40,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:27:40,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:27:40,569 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 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 15:27:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:40,613 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-20 15:27:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:40,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 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 56 [2022-03-20 15:27:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:40,615 INFO L225 Difference]: With dead ends: 79 [2022-03-20 15:27:40,615 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 15:27:40,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:40,616 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:40,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:27:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 15:27:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 15:27:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 15:27:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-20 15:27:40,624 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-20 15:27:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:40,624 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-20 15:27:40,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 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 15:27:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-20 15:27:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 15:27:40,638 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:40,638 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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] [2022-03-20 15:27:40,701 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 15:27:40,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:40,839 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-20 15:27:40,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:40,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1574346892] [2022-03-20 15:27:40,840 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:40,840 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 2 times [2022-03-20 15:27:40,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:40,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892195300] [2022-03-20 15:27:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:40,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:40,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:40,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144985488] [2022-03-20 15:27:40,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:40,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:40,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:40,849 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 15:27:40,850 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 15:27:40,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:40,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:40,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 15:27:40,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 15:27:41,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 15:27:45,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892195300] [2022-03-20 15:27:45,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144985488] [2022-03-20 15:27:45,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144985488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:27:45,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:27:45,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 15:27:45,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1574346892] [2022-03-20 15:27:45,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1574346892] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:45,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:45,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:27:45,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927195300] [2022-03-20 15:27:45,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:45,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:27:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:27:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:27:45,886 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 15:27:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:46,069 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-20 15:27:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:27:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-03-20 15:27:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:46,071 INFO L225 Difference]: With dead ends: 135 [2022-03-20 15:27:46,071 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 15:27:46,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:27:46,072 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:46,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 326 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:46,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 15:27:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-20 15:27:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 15:27:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-20 15:27:46,082 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 75 [2022-03-20 15:27:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:46,083 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-20 15:27:46,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 15:27:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-20 15:27:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 15:27:46,084 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:46,084 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 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] [2022-03-20 15:27:46,101 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 15:27:46,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:46,296 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 3 times [2022-03-20 15:27:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:46,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392183400] [2022-03-20 15:27:46,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 4 times [2022-03-20 15:27:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:46,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256128298] [2022-03-20 15:27:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:46,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:46,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:46,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867492237] [2022-03-20 15:27:46,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:27:46,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:46,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:46,306 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 15:27:46,307 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 15:27:46,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:27:46,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:46,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:27:46,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 15:27:46,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 15:27:48,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256128298] [2022-03-20 15:27:48,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867492237] [2022-03-20 15:27:48,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867492237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:27:48,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:27:48,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-20 15:27:48,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:48,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392183400] [2022-03-20 15:27:48,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392183400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:48,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:48,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:27:48,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690969869] [2022-03-20 15:27:48,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:48,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:27:48,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:48,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:27:48,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:27:48,212 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 15:27:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:48,328 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-03-20 15:27:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:27:48,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-20 15:27:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:48,329 INFO L225 Difference]: With dead ends: 133 [2022-03-20 15:27:48,329 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 15:27:48,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:27:48,330 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:48,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 265 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 15:27:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 15:27:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 15:27:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-03-20 15:27:48,342 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 80 [2022-03-20 15:27:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:48,342 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-03-20 15:27:48,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 15:27:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-03-20 15:27:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 15:27:48,343 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:48,343 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 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] [2022-03-20 15:27:48,362 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 15:27:48,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:48,559 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:48,560 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-20 15:27:48,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:48,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067998053] [2022-03-20 15:27:48,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:48,560 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 2 times [2022-03-20 15:27:48,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:48,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545861669] [2022-03-20 15:27:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:48,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:48,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:48,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688290050] [2022-03-20 15:27:48,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:48,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:48,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:48,577 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 15:27:48,578 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 15:27:48,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:48,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:48,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 15:27:48,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 15:27:49,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:28:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 15:28:00,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:28:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545861669] [2022-03-20 15:28:00,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:28:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688290050] [2022-03-20 15:28:00,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688290050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:28:00,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:28:00,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-20 15:28:00,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:28:00,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067998053] [2022-03-20 15:28:00,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067998053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:28:00,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:28:00,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:28:00,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049080787] [2022-03-20 15:28:00,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:28:00,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:28:00,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:28:00,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:28:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:28:00,316 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:28:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:28:01,513 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2022-03-20 15:28:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:28:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-20 15:28:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:28:01,514 INFO L225 Difference]: With dead ends: 116 [2022-03-20 15:28:01,514 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 15:28:01,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:28:01,515 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:28:01,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 342 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:28:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 15:28:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 15:28:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 15:28:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-03-20 15:28:01,522 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 86 [2022-03-20 15:28:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:28:01,522 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-03-20 15:28:01,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:28:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-03-20 15:28:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 15:28:01,523 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:28:01,523 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:28:01,539 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 15:28:01,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:28:01,738 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:28:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:28:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 5 times [2022-03-20 15:28:01,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:28:01,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1980564798] [2022-03-20 15:28:01,739 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:28:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 6 times [2022-03-20 15:28:01,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:28:01,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714433068] [2022-03-20 15:28:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:28:01,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:28:01,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:28:01,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180340856] [2022-03-20 15:28:01,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:28:01,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:28:01,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:28:01,756 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 15:28:01,774 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 15:28:01,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 15:28:01,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:28:01,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 15:28:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:28:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 15:28:14,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:29:06,865 WARN L232 SmtUtils]: Spent 28.30s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:30:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 15:30:01,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:30:01,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714433068] [2022-03-20 15:30:01,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:30:01,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180340856] [2022-03-20 15:30:01,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180340856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:30:01,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:30:01,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-20 15:30:01,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:30:01,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1980564798] [2022-03-20 15:30:01,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1980564798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:30:01,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:30:01,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:30:01,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750946428] [2022-03-20 15:30:01,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:30:01,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:30:01,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:30:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2022-03-20 15:30:01,433 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 15:30:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:30:02,008 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-03-20 15:30:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:30:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2022-03-20 15:30:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:30:02,010 INFO L225 Difference]: With dead ends: 112 [2022-03-20 15:30:02,010 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 15:30:02,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=59, Invalid=211, Unknown=2, NotChecked=0, Total=272 [2022-03-20 15:30:02,010 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:30:02,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 259 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 15:30:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 15:30:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-20 15:30:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 15:30:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-03-20 15:30:02,018 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 92 [2022-03-20 15:30:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:30:02,018 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-03-20 15:30:02,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 15:30:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-03-20 15:30:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 15:30:02,019 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:30:02,019 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 15:30:02,039 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 15:30:02,219 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,SelfDestructingSolverStorable10 [2022-03-20 15:30:02,220 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:30:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:30:02,220 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 7 times [2022-03-20 15:30:02,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:02,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [96943499] [2022-03-20 15:30:02,221 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:30:02,221 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 8 times [2022-03-20 15:30:02,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:30:02,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747236503] [2022-03-20 15:30:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:30:02,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:30:02,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:30:02,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259451899] [2022-03-20 15:30:02,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:30:02,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:30:02,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:30:02,229 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 15:30:02,229 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 15:30:02,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:30:02,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:30:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 15:30:02,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:30:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 15:30:02,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:30:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 15:30:05,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:30:05,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747236503] [2022-03-20 15:30:05,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:30:05,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259451899] [2022-03-20 15:30:05,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259451899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:30:05,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:30:05,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 15:30:05,070 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:30:05,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [96943499] [2022-03-20 15:30:05,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [96943499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:30:05,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:30:05,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:30:05,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314763223] [2022-03-20 15:30:05,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:30:05,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:30:05,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:30:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:30:05,071 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 15:30:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:30:05,402 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2022-03-20 15:30:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:30:05,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-03-20 15:30:05,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:30:05,405 INFO L225 Difference]: With dead ends: 177 [2022-03-20 15:30:05,405 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 15:30:05,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:30:05,408 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:30:05,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 400 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:30:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 15:30:05,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-03-20 15:30:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 15:30:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-20 15:30:05,426 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 97 [2022-03-20 15:30:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:30:05,427 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-20 15:30:05,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 15:30:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-20 15:30:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 15:30:05,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:30:05,428 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:30:05,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 15:30:05,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:30:05,643 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:30:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:30:05,644 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 9 times [2022-03-20 15:30:05,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:05,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567788140] [2022-03-20 15:30:05,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:30:05,644 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 10 times [2022-03-20 15:30:05,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:30:05,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674848712] [2022-03-20 15:30:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:30:05,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:30:05,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:30:05,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416398248] [2022-03-20 15:30:05,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:30:05,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:30:05,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:30:05,660 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:30:05,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 15:30:05,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:30:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:30:05,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 15:30:05,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:30:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-03-20 15:30:06,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:30:28,017 WARN L232 SmtUtils]: Spent 7.07s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:31:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 15:31:08,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:31:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674848712] [2022-03-20 15:31:08,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:31:08,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416398248] [2022-03-20 15:31:08,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416398248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:31:08,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:31:08,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2022-03-20 15:31:08,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:31:08,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1567788140] [2022-03-20 15:31:08,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1567788140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:31:08,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:31:08,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:31:08,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233815765] [2022-03-20 15:31:08,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:31:08,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:31:08,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:31:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=402, Unknown=1, NotChecked=0, Total=506 [2022-03-20 15:31:08,651 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 15:31:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:31:09,375 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2022-03-20 15:31:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:31:09,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 105 [2022-03-20 15:31:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:31:09,377 INFO L225 Difference]: With dead ends: 184 [2022-03-20 15:31:09,377 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 15:31:09,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=111, Invalid=488, Unknown=1, NotChecked=0, Total=600 [2022-03-20 15:31:09,377 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 25 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:31:09,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 490 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:31:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 15:31:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-20 15:31:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 93 states have (on average 1.086021505376344) internal successors, (101), 98 states have internal predecessors, (101), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 15:31:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 170 transitions. [2022-03-20 15:31:09,390 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 170 transitions. Word has length 105 [2022-03-20 15:31:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:31:09,391 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 170 transitions. [2022-03-20 15:31:09,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 15:31:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 170 transitions. [2022-03-20 15:31:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 15:31:09,391 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:31:09,391 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:31:09,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 15:31:09,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 15:31:09,607 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:31:09,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:31:09,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 11 times [2022-03-20 15:31:09,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:09,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1596673427] [2022-03-20 15:31:09,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:31:09,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 12 times [2022-03-20 15:31:09,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:31:09,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59792962] [2022-03-20 15:31:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:31:09,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:31:09,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:31:09,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248260467] [2022-03-20 15:31:09,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:31:09,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:31:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:31:09,615 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:31:09,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 15:31:09,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:31:09,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:31:09,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 15:31:09,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:31:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 96 proven. 4 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2022-03-20 15:31:10,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:31:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 71 proven. 4 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 15:31:11,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:31:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59792962] [2022-03-20 15:31:11,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:31:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248260467] [2022-03-20 15:31:11,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248260467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:31:11,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:31:11,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 15:31:11,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:31:11,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1596673427] [2022-03-20 15:31:11,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1596673427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:31:11,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:31:11,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:31:11,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050361144] [2022-03-20 15:31:11,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:31:11,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:31:11,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:31:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:31:11,543 INFO L87 Difference]: Start difference. First operand 151 states and 170 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 15:31:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:31:11,883 INFO L93 Difference]: Finished difference Result 172 states and 193 transitions. [2022-03-20 15:31:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:31:11,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 114 [2022-03-20 15:31:11,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:31:11,884 INFO L225 Difference]: With dead ends: 172 [2022-03-20 15:31:11,884 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 15:31:11,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 14 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:31:11,885 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 20 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:31:11,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 324 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 233 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-03-20 15:31:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 15:31:11,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-03-20 15:31:11,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 103 states have internal predecessors, (106), 38 states have call successors, (38), 23 states have call predecessors, (38), 22 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 15:31:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 179 transitions. [2022-03-20 15:31:11,897 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 179 transitions. Word has length 114 [2022-03-20 15:31:11,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:31:11,897 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 179 transitions. [2022-03-20 15:31:11,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 15:31:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 179 transitions. [2022-03-20 15:31:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 15:31:11,898 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:31:11,898 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:31:11,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 15:31:12,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 15:31:12,111 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:31:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:31:12,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 3 times [2022-03-20 15:31:12,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:12,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755903492] [2022-03-20 15:31:12,112 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:31:12,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 4 times [2022-03-20 15:31:12,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:31:12,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659106624] [2022-03-20 15:31:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:31:12,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:31:12,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:31:12,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066274724] [2022-03-20 15:31:12,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:31:12,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:31:12,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:31:12,120 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:31:12,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 15:31:12,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:31:12,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:31:12,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 15:31:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:31:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2022-03-20 15:31:13,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:31:23,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:31:23,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659106624] [2022-03-20 15:31:23,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:31:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066274724] [2022-03-20 15:31:23,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066274724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:31:23,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:31:23,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 15:31:23,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:31:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755903492] [2022-03-20 15:31:23,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755903492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:31:23,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:31:23,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:31:23,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400934253] [2022-03-20 15:31:23,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:31:23,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:31:23,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:23,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:31:23,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:31:23,373 INFO L87 Difference]: Start difference. First operand 159 states and 179 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 15:31:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:31:24,856 INFO L93 Difference]: Finished difference Result 200 states and 233 transitions. [2022-03-20 15:31:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:31:24,862 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 116 [2022-03-20 15:31:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:31:24,863 INFO L225 Difference]: With dead ends: 200 [2022-03-20 15:31:24,863 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 15:31:24,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:31:24,864 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 23 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:31:24,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 439 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 15:31:24,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 15:31:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2022-03-20 15:31:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 77 states have internal predecessors, (80), 29 states have call successors, (29), 18 states have call predecessors, (29), 17 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 15:31:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2022-03-20 15:31:24,876 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 116 [2022-03-20 15:31:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:31:24,876 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2022-03-20 15:31:24,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 15:31:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2022-03-20 15:31:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 15:31:24,877 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:31:24,877 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:31:24,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 15:31:25,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 15:31:25,094 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:31:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:31:25,095 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 13 times [2022-03-20 15:31:25,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:25,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [148221795] [2022-03-20 15:31:25,095 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:31:25,095 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 14 times [2022-03-20 15:31:25,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:31:25,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312893389] [2022-03-20 15:31:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:31:25,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:31:25,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:31:25,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348307441] [2022-03-20 15:31:25,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:31:25,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:31:25,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:31:25,103 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:31:25,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 15:31:25,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:31:25,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:31:25,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 15:31:25,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:31:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-03-20 15:31:26,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:31:41,573 WARN L855 $PredicateComparison]: unable to prove that (<= 0 (div (let ((.cse0 (mod c_main_~A~0 4294967296))) (+ (div .cse0 8) (* (- 1) (div (+ (- 1) (* (- 1) .cse0)) (- 6))) 1)) 4294967296)) is different from true [2022-03-20 15:31:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-03-20 15:31:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:31:46,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312893389] [2022-03-20 15:31:46,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:31:46,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348307441] [2022-03-20 15:31:46,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348307441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:31:46,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:31:46,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-03-20 15:31:46,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:31:46,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [148221795] [2022-03-20 15:31:46,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [148221795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:31:46,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:31:46,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:31:46,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287476651] [2022-03-20 15:31:46,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:31:46,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:31:46,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:46,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:31:46,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=356, Unknown=1, NotChecked=40, Total=506 [2022-03-20 15:31:46,043 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 15:31:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:31:47,353 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2022-03-20 15:31:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:31:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2022-03-20 15:31:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:31:47,355 INFO L225 Difference]: With dead ends: 146 [2022-03-20 15:31:47,355 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 15:31:47,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=217, Invalid=716, Unknown=1, NotChecked=58, Total=992 [2022-03-20 15:31:47,355 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 33 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 15:31:47,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 444 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 15:31:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 15:31:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2022-03-20 15:31:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 26 states have call successors, (26), 17 states have call predecessors, (26), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 15:31:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2022-03-20 15:31:47,367 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 122 [2022-03-20 15:31:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:31:47,368 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2022-03-20 15:31:47,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 15:31:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2022-03-20 15:31:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 15:31:47,368 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:31:47,368 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:31:47,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 15:31:47,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 15:31:47,586 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:31:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:31:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash -523768505, now seen corresponding path program 1 times [2022-03-20 15:31:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:47,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2052889624] [2022-03-20 15:31:47,587 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:31:47,596 INFO L85 PathProgramCache]: Analyzing trace with hash -523768505, now seen corresponding path program 2 times [2022-03-20 15:31:47,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:31:47,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646455070] [2022-03-20 15:31:47,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:31:47,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:31:47,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:31:47,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251502243] [2022-03-20 15:31:47,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:31:47,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:31:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:31:47,606 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:31:47,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 15:31:47,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:31:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:31:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 15:31:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:31:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-03-20 15:31:48,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:32:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-20 15:32:05,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:32:05,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646455070] [2022-03-20 15:32:05,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:32:05,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251502243] [2022-03-20 15:32:05,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251502243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:32:05,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:32:05,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2022-03-20 15:32:05,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:32:05,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2052889624] [2022-03-20 15:32:05,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2052889624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:32:05,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:32:05,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:32:05,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62701076] [2022-03-20 15:32:05,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:32:05,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:32:05,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:32:05,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:32:05,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:32:05,780 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 15:32:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:32:06,716 INFO L93 Difference]: Finished difference Result 171 states and 201 transitions. [2022-03-20 15:32:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:32:06,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) Word has length 127 [2022-03-20 15:32:06,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:32:06,717 INFO L225 Difference]: With dead ends: 171 [2022-03-20 15:32:06,717 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 15:32:06,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:32:06,718 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 35 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:32:06,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 639 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 15:32:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 15:32:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-20 15:32:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 92 states have (on average 1.065217391304348) internal successors, (98), 96 states have internal predecessors, (98), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 15:32:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2022-03-20 15:32:06,739 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 127 [2022-03-20 15:32:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:32:06,740 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2022-03-20 15:32:06,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 15:32:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2022-03-20 15:32:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 15:32:06,741 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:32:06,741 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:32:06,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 15:32:06,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:32:06,958 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:32:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:32:06,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1932789221, now seen corresponding path program 3 times [2022-03-20 15:32:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:32:06,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [767730504] [2022-03-20 15:32:06,959 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:32:06,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1932789221, now seen corresponding path program 4 times [2022-03-20 15:32:06,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:32:06,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931750683] [2022-03-20 15:32:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:32:06,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:32:06,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:32:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311827095] [2022-03-20 15:32:06,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:32:06,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:32:06,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:32:06,966 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:32:06,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 15:32:07,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:32:07,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:32:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 15:32:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:32:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-03-20 15:32:08,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:33:13,271 WARN L232 SmtUtils]: Spent 7.56s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:33:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-03-20 15:33:57,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:33:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931750683] [2022-03-20 15:33:57,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:33:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311827095] [2022-03-20 15:33:57,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311827095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:33:57,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:33:57,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 26 [2022-03-20 15:33:57,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:33:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [767730504] [2022-03-20 15:33:57,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [767730504] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:33:57,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:33:57,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:33:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936858993] [2022-03-20 15:33:57,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:33:57,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:33:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:33:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:33:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-20 15:33:57,849 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-03-20 15:33:59,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:33:59,226 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2022-03-20 15:33:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:33:59,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 135 [2022-03-20 15:33:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:33:59,227 INFO L225 Difference]: With dead ends: 180 [2022-03-20 15:33:59,227 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 15:33:59,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-03-20 15:33:59,228 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:33:59,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 561 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 15:33:59,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 15:33:59,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 15:33:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 112 states have internal predecessors, (114), 38 states have call successors, (38), 26 states have call predecessors, (38), 25 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 15:33:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 187 transitions. [2022-03-20 15:33:59,249 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 187 transitions. Word has length 135 [2022-03-20 15:33:59,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:33:59,249 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 187 transitions. [2022-03-20 15:33:59,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-03-20 15:33:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 187 transitions. [2022-03-20 15:33:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 15:33:59,252 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:33:59,252 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:33:59,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 15:33:59,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 15:33:59,467 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:33:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:33:59,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1246986233, now seen corresponding path program 5 times [2022-03-20 15:33:59,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:33:59,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [827314399] [2022-03-20 15:33:59,468 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:33:59,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1246986233, now seen corresponding path program 6 times [2022-03-20 15:33:59,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:33:59,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639240562] [2022-03-20 15:33:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:33:59,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:33:59,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:33:59,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368677300] [2022-03-20 15:33:59,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:33:59,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:33:59,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:33:59,475 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:33:59,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 15:33:59,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 15:33:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:33:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 15:33:59,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:34:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 461 proven. 3 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2022-03-20 15:34:00,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:34:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 63 proven. 33 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2022-03-20 15:34:00,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:34:00,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639240562] [2022-03-20 15:34:00,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:34:00,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368677300] [2022-03-20 15:34:00,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368677300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:34:00,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:34:00,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-20 15:34:00,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:34:00,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [827314399] [2022-03-20 15:34:00,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [827314399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:34:00,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:34:00,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:34:00,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724197567] [2022-03-20 15:34:00,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:34:00,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:34:00,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:34:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:34:00,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:34:00,835 INFO L87 Difference]: Start difference. First operand 173 states and 187 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:34:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:34:01,260 INFO L93 Difference]: Finished difference Result 179 states and 192 transitions. [2022-03-20 15:34:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:34:01,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 144 [2022-03-20 15:34:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:34:01,262 INFO L225 Difference]: With dead ends: 179 [2022-03-20 15:34:01,262 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 15:34:01,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:34:01,263 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 31 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:34:01,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 265 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:34:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 15:34:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-03-20 15:34:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.0) internal successors, (78), 78 states have internal predecessors, (78), 26 states have call successors, (26), 20 states have call predecessors, (26), 18 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 15:34:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2022-03-20 15:34:01,296 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 144 [2022-03-20 15:34:01,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:34:01,297 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2022-03-20 15:34:01,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:34:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2022-03-20 15:34:01,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 15:34:01,319 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:34:01,320 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:34:01,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 15:34:01,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:34:01,520 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:34:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:34:01,521 INFO L85 PathProgramCache]: Analyzing trace with hash 667564579, now seen corresponding path program 1 times [2022-03-20 15:34:01,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:34:01,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934542526] [2022-03-20 15:34:01,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:34:01,521 INFO L85 PathProgramCache]: Analyzing trace with hash 667564579, now seen corresponding path program 2 times [2022-03-20 15:34:01,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:34:01,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501788877] [2022-03-20 15:34:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:34:01,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:34:01,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:34:01,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600001316] [2022-03-20 15:34:01,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:34:01,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:34:01,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:34:01,529 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:34:01,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 15:34:01,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:34:01,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:34:01,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 15:34:01,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:34:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 40 proven. 63 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2022-03-20 15:34:04,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:34:05,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:34:05,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501788877] [2022-03-20 15:34:05,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:34:05,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600001316] [2022-03-20 15:34:05,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600001316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:34:05,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:34:05,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 15:34:05,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:34:05,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934542526] [2022-03-20 15:34:05,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934542526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:34:05,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:34:05,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:34:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270997818] [2022-03-20 15:34:05,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:34:05,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:34:05,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:34:05,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:34:05,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:34:05,622 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-03-20 15:34:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:34:07,250 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-03-20 15:34:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:34:07,251 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 146 [2022-03-20 15:34:07,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:34:07,251 INFO L225 Difference]: With dead ends: 123 [2022-03-20 15:34:07,251 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 15:34:07,252 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-03-20 15:34:07,252 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 23 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:34:07,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 380 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 15:34:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 15:34:07,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 15:34:07,253 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 15:34:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 15:34:07,253 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 146 [2022-03-20 15:34:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:34:07,253 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 15:34:07,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-03-20 15:34:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 15:34:07,253 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 15:34:07,255 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 15:34:07,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 15:34:07,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:34:07,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 15:34:22,939 WARN L232 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 245 DAG size of output: 118 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 15:34:30,902 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-20 15:34:30,902 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-20 15:34:30,902 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-20 15:34:30,902 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-20 15:34:30,902 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 15:34:30,902 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 15:34:30,902 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 15:34:30,902 INFO L878 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (and (<= 1 (mod main_~B~0 4294967296)) (<= (mod main_~A~0 4294967296) 5)) [2022-03-20 15:34:30,902 INFO L878 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: (and (= main_~d~0 (mod main_~B~0 4294967296)) (= main_~p~0 1)) [2022-03-20 15:34:30,903 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 63) the Hoare annotation is: true [2022-03-20 15:34:30,903 INFO L878 garLoopResultBuilder]: At program point L54(lines 54 57) the Hoare annotation is: (let ((.cse2 (mod main_~A~0 4294967296)) (.cse12 (* (- 1) main_~r~0))) (let ((.cse9 (div (+ .cse2 .cse12) 2)) (.cse7 (mod main_~B~0 4294967296))) (let ((.cse3 (* 2 .cse7)) (.cse5 (< (* main_~r~0 2) .cse2)) (.cse6 (= main_~p~0 1)) (.cse10 (<= (* .cse7 4) .cse2)) (.cse0 (= main_~d~0 .cse9)) (.cse11 (= main_~q~0 4)) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse7)) .cse2)) (.cse13 (* main_~d~0 2)) (.cse4 (<= .cse2 5)) (.cse8 (= main_~q~0 0))) (or (and (<= 0 main_~r~0) .cse0 .cse1 (= .cse2 (+ main_~r~0 .cse3)) .cse4 .cse5 .cse6) (and (= main_~d~0 .cse7) (< main_~r~0 .cse3) .cse1 .cse8 (<= .cse7 main_~r~0) .cse6) (and (= main_~d~0 (div .cse9 2)) .cse10 .cse1 .cse4 .cse11 .cse5 .cse6) (and (= main_~p~0 2) .cse10 .cse0 .cse1 .cse11 (<= (div (+ (* (- 2) main_~d~0) 5 .cse12) (- 4294967296)) (div (+ main_~r~0 .cse13) 4294967296)) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and (= main_~d~0 (* main_~p~0 .cse7)) .cse1 (< main_~r~0 .cse13) .cse4 .cse8 (= (mod main_~p~0 2) 0) (<= main_~d~0 main_~r~0)))))) [2022-03-20 15:34:30,903 INFO L878 garLoopResultBuilder]: At program point L54-2(lines 22 63) the Hoare annotation is: (let ((.cse8 (mod main_~B~0 4294967296))) (let ((.cse19 (* (- 1) main_~d~0)) (.cse24 (+ main_~d~0 main_~r~0)) (.cse26 (* (- 1) main_~r~0)) (.cse25 (* .cse8 4)) (.cse5 (mod main_~A~0 4294967296)) (.cse9 (* 8 .cse8))) (let ((.cse12 (< .cse5 .cse9)) (.cse13 (= .cse25 main_~d~0)) (.cse16 (= main_~p~0 4)) (.cse3 (div (+ .cse5 .cse26) 2)) (.cse2 (<= .cse25 .cse5)) (.cse7 (= main_~q~0 4)) (.cse17 (< main_~r~0 main_~d~0)) (.cse1 (= main_~p~0 2)) (.cse14 (= .cse24 .cse5)) (.cse6 (* main_~r~0 2)) (.cse22 (* main_~d~0 2)) (.cse10 (div (+ .cse19 .cse5 .cse26) 2)) (.cse20 (= main_~d~0 .cse8)) (.cse0 (<= 0 main_~r~0)) (.cse23 (* 2 .cse8)) (.cse11 (= main_~p~0 1)) (.cse21 (= main_~d~0 (* main_~p~0 .cse8))) (.cse15 (= (+ main_~r~0 (* main_~q~0 .cse8)) .cse5)) (.cse4 (<= .cse5 5)) (.cse18 (= main_~q~0 0))) (or (and .cse0 .cse1 .cse2 (= main_~d~0 .cse3) .cse4 (= (mod (div (- (div (+ (* (- 2) .cse5) .cse6) (- 2))) (- 2)) 2) 0) .cse7 (< (div (+ (* (- 4) .cse8) 5) (- 4294967296)) (+ (div (+ (- 1) .cse9) 4294967296) 1)) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and (= (+ main_~p~0 4) main_~q~0) .cse0 .cse4 (= .cse5 (+ (* 5 .cse8) main_~r~0)) (= (div .cse10 2) main_~d~0) .cse11 .cse12) (and .cse13 .cse14 .cse2 .cse15 .cse4 .cse16 .cse12) (and .cse17 .cse13 .cse15 .cse4 .cse18 .cse16 (<= (div .cse19 (- 2)) main_~r~0)) (and .cse20 .cse15 .cse18 .cse11) (and (= main_~d~0 (div .cse3 2)) (not (<= .cse9 .cse5)) .cse2 .cse15 .cse4 .cse7 .cse11) (and .cse17 .cse21 .cse1 .cse15 .cse18 (<= .cse8 main_~r~0)) (and (< .cse5 .cse22) .cse0 .cse1 (= (mod (div (* (- 2) main_~d~0) (- 2)) 2) 0) .cse14 .cse15 .cse4 (<= .cse23 .cse24) (< .cse24 .cse25)) (and .cse20 (= .cse5 (+ main_~r~0 .cse8)) (= main_~q~0 1) (<= .cse8 .cse24) (< .cse5 .cse23) .cse11) (and (< (+ .cse6 .cse22) .cse5) (= main_~q~0 3) .cse0 (= main_~d~0 .cse10) (= (+ main_~r~0 (* 3 .cse8)) .cse5) .cse4 .cse11) (and .cse20 .cse0 (< main_~r~0 .cse23) .cse15 (= .cse5 (+ main_~r~0 .cse23)) .cse4 .cse11) (and .cse21 (<= 1 .cse8) .cse15 (= .cse9 main_~d~0) .cse4 .cse18 (<= .cse25 main_~r~0)))))) [2022-03-20 15:34:30,903 INFO L878 garLoopResultBuilder]: At program point L48(lines 46 58) the Hoare annotation is: (let ((.cse8 (mod main_~B~0 4294967296))) (let ((.cse19 (+ main_~d~0 main_~r~0)) (.cse25 (* .cse8 4)) (.cse9 (* 8 .cse8)) (.cse23 (* (- 1) main_~d~0)) (.cse5 (mod main_~A~0 4294967296)) (.cse26 (* (- 1) main_~r~0))) (let ((.cse6 (* main_~r~0 2)) (.cse14 (div (+ .cse23 .cse5 .cse26) 2)) (.cse16 (< .cse5 .cse9)) (.cse11 (< main_~r~0 main_~d~0)) (.cse20 (= .cse25 main_~d~0)) (.cse22 (= main_~p~0 4)) (.cse3 (div (+ .cse5 .cse26) 2)) (.cse2 (<= .cse25 .cse5)) (.cse7 (= main_~q~0 4)) (.cse17 (* main_~d~0 2)) (.cse1 (= main_~p~0 2)) (.cse21 (= .cse19 .cse5)) (.cse18 (= main_~d~0 .cse8)) (.cse0 (<= 0 main_~r~0)) (.cse10 (* 2 .cse8)) (.cse15 (= main_~p~0 1)) (.cse24 (= main_~d~0 (* main_~p~0 .cse8))) (.cse12 (= (+ main_~r~0 (* main_~q~0 .cse8)) .cse5)) (.cse4 (<= .cse5 5)) (.cse13 (= main_~q~0 0))) (or (and .cse0 .cse1 .cse2 (= main_~d~0 .cse3) .cse4 (= (mod (div (- (div (+ (* (- 2) .cse5) .cse6) (- 2))) (- 2)) 2) 0) .cse7 (< (div (+ (* (- 4) .cse8) 5) (- 4294967296)) (+ (div (+ (- 1) .cse9) 4294967296) 1)) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and (= main_~d~0 .cse10) .cse11 .cse1 .cse12 .cse13 (<= .cse8 main_~r~0)) (and (= (+ main_~p~0 4) main_~q~0) .cse0 .cse4 (= .cse5 (+ (* 5 .cse8) main_~r~0)) (= (div .cse14 2) main_~d~0) .cse15 .cse16) (and (< (+ .cse6 .cse17) .cse5) .cse0 (= main_~d~0 .cse14) .cse12 (= (+ main_~r~0 (* 3 .cse8)) .cse5) .cse4 .cse15) (and .cse18 (= .cse5 (+ (* (mod main_~d~0 4294967296) main_~q~0) main_~r~0)) (= main_~q~0 1) (<= .cse8 .cse19) (< .cse5 .cse10) .cse15) (and .cse20 .cse21 .cse2 .cse12 .cse4 .cse22 .cse16) (and .cse11 .cse20 .cse12 .cse4 .cse13 .cse22 (<= (div .cse23 (- 2)) main_~r~0)) (and (= main_~d~0 (div .cse3 2)) (not (<= .cse9 .cse5)) .cse2 .cse12 .cse4 .cse7 .cse15) (and .cse24 .cse12 .cse13 .cse15) (and (< .cse5 .cse17) .cse0 .cse1 (= (mod (div (* (- 2) main_~d~0) (- 2)) 2) 0) .cse21 .cse12 .cse4 (<= .cse10 .cse19) (< .cse19 .cse25)) (and .cse18 .cse0 (< main_~r~0 .cse10) .cse12 (= .cse5 (+ main_~r~0 .cse10)) .cse4 .cse15) (and .cse24 (<= 1 .cse8) .cse12 (= .cse9 main_~d~0) .cse4 .cse13 (<= .cse25 main_~r~0)))))) [2022-03-20 15:34:30,903 INFO L878 garLoopResultBuilder]: At program point L46-1(lines 46 58) the Hoare annotation is: (let ((.cse3 (mod main_~B~0 4294967296)) (.cse2 (mod main_~A~0 4294967296)) (.cse10 (* (- 1) main_~r~0))) (let ((.cse4 (div (+ (* (- 1) main_~d~0) .cse2 .cse10) 2)) (.cse6 (* 8 .cse3)) (.cse8 (= main_~d~0 .cse3)) (.cse0 (<= 0 main_~r~0)) (.cse7 (= (+ main_~r~0 (* main_~q~0 .cse3)) .cse2)) (.cse9 (* 2 .cse3)) (.cse1 (<= .cse2 5)) (.cse5 (= main_~p~0 1))) (or (and (= (+ main_~p~0 4) main_~q~0) .cse0 .cse1 (= .cse2 (+ (* 5 .cse3) main_~r~0)) (= (div .cse4 2) main_~d~0) .cse5 (< .cse2 .cse6)) (and (< (+ (* main_~r~0 2) (* main_~d~0 2)) .cse2) .cse0 (= main_~d~0 .cse4) .cse7 (= (+ main_~r~0 (* 3 .cse3)) .cse2) .cse1 .cse5) (and .cse8 (= .cse2 (+ (* (mod main_~d~0 4294967296) main_~q~0) main_~r~0)) (= main_~q~0 1) (<= .cse3 (+ main_~d~0 main_~r~0)) (< .cse2 .cse9) .cse5) (and (= main_~d~0 (div (div (+ .cse2 .cse10) 2) 2)) (not (<= .cse6 .cse2)) (<= (* .cse3 4) .cse2) .cse7 .cse1 (= main_~q~0 4) .cse5) (and (= main_~d~0 (* main_~p~0 .cse3)) .cse7 (= main_~q~0 0) .cse5) (and .cse8 .cse0 (< main_~r~0 .cse9) .cse7 (= .cse2 (+ main_~r~0 .cse9)) .cse1 .cse5)))) [2022-03-20 15:34:30,903 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 63) the Hoare annotation is: true [2022-03-20 15:34:30,903 INFO L878 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (let ((.cse6 (mod main_~A~0 4294967296)) (.cse5 (mod main_~B~0 4294967296))) (let ((.cse4 (= main_~d~0 (* main_~p~0 .cse5))) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse5)) .cse6)) (.cse2 (<= .cse6 5)) (.cse3 (= main_~q~0 0)) (.cse0 (* .cse5 4))) (or (and (= .cse0 main_~d~0) (< (div (div (div (+ main_~d~0 (- 4)) 2) 2) (- 4294967296)) 1) .cse1 .cse2 .cse3 (= main_~p~0 4) (<= (div (* (- 1) main_~d~0) (- 2)) main_~r~0)) (and .cse4 .cse1 (< (div (+ (- 1) main_~d~0) (- 4294967296)) 1) .cse2 .cse3 (= main_~p~0 1)) (and .cse4 (= main_~p~0 2) .cse1 .cse2 .cse3 (<= .cse5 main_~r~0) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and .cse4 (<= 1 .cse5) .cse1 (= (* 8 .cse5) main_~d~0) .cse2 .cse3 (<= .cse0 main_~r~0))))) [2022-03-20 15:34:30,903 INFO L878 garLoopResultBuilder]: At program point L36-2(lines 36 44) the Hoare annotation is: (let ((.cse6 (mod main_~A~0 4294967296)) (.cse5 (mod main_~B~0 4294967296))) (let ((.cse4 (= main_~d~0 (* main_~p~0 .cse5))) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse5)) .cse6)) (.cse2 (<= .cse6 5)) (.cse3 (= main_~q~0 0)) (.cse0 (* .cse5 4))) (or (and (= .cse0 main_~d~0) (< (div (div (div (+ main_~d~0 (- 4)) 2) 2) (- 4294967296)) 1) .cse1 .cse2 .cse3 (= main_~p~0 4) (<= (div (* (- 1) main_~d~0) (- 2)) main_~r~0)) (and .cse4 .cse1 (< (div (+ (- 1) main_~d~0) (- 4294967296)) 1) .cse2 .cse3 (= main_~p~0 1)) (and .cse4 (= main_~p~0 2) .cse1 .cse2 .cse3 (<= .cse5 main_~r~0) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and .cse4 (<= 1 .cse5) .cse1 (= (* 8 .cse5) main_~d~0) .cse2 .cse3 (<= .cse0 main_~r~0))))) [2022-03-20 15:34:30,903 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 63) the Hoare annotation is: true [2022-03-20 15:34:30,903 INFO L885 garLoopResultBuilder]: At program point L61(line 61) the Hoare annotation is: true [2022-03-20 15:34:30,903 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (<= (mod main_~A~0 4294967296) 5) [2022-03-20 15:34:30,904 INFO L878 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: (<= (mod main_~A~0 4294967296) 5) [2022-03-20 15:34:30,904 INFO L885 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-03-20 15:34:30,904 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (<= (mod main_~A~0 4294967296) 5) [2022-03-20 15:34:30,904 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (let ((.cse8 (mod main_~B~0 4294967296))) (let ((.cse19 (* (- 1) main_~d~0)) (.cse24 (+ main_~d~0 main_~r~0)) (.cse26 (* (- 1) main_~r~0)) (.cse25 (* .cse8 4)) (.cse5 (mod main_~A~0 4294967296)) (.cse9 (* 8 .cse8))) (let ((.cse12 (< .cse5 .cse9)) (.cse13 (= .cse25 main_~d~0)) (.cse16 (= main_~p~0 4)) (.cse3 (div (+ .cse5 .cse26) 2)) (.cse2 (<= .cse25 .cse5)) (.cse7 (= main_~q~0 4)) (.cse17 (< main_~r~0 main_~d~0)) (.cse1 (= main_~p~0 2)) (.cse14 (= .cse24 .cse5)) (.cse6 (* main_~r~0 2)) (.cse22 (* main_~d~0 2)) (.cse10 (div (+ .cse19 .cse5 .cse26) 2)) (.cse20 (= main_~d~0 .cse8)) (.cse0 (<= 0 main_~r~0)) (.cse23 (* 2 .cse8)) (.cse11 (= main_~p~0 1)) (.cse21 (= main_~d~0 (* main_~p~0 .cse8))) (.cse15 (= (+ main_~r~0 (* main_~q~0 .cse8)) .cse5)) (.cse4 (<= .cse5 5)) (.cse18 (= main_~q~0 0))) (or (and .cse0 .cse1 .cse2 (= main_~d~0 .cse3) .cse4 (= (mod (div (- (div (+ (* (- 2) .cse5) .cse6) (- 2))) (- 2)) 2) 0) .cse7 (< (div (+ (* (- 4) .cse8) 5) (- 4294967296)) (+ (div (+ (- 1) .cse9) 4294967296) 1)) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and (= (+ main_~p~0 4) main_~q~0) .cse0 .cse4 (= .cse5 (+ (* 5 .cse8) main_~r~0)) (= (div .cse10 2) main_~d~0) .cse11 .cse12) (and .cse13 .cse14 .cse2 .cse15 .cse4 .cse16 .cse12) (and .cse17 .cse13 .cse15 .cse4 .cse18 .cse16 (<= (div .cse19 (- 2)) main_~r~0)) (and .cse20 .cse15 .cse18 .cse11) (and (= main_~d~0 (div .cse3 2)) (not (<= .cse9 .cse5)) .cse2 .cse15 .cse4 .cse7 .cse11) (and .cse17 .cse21 .cse1 .cse15 .cse18 (<= .cse8 main_~r~0)) (and (< .cse5 .cse22) .cse0 .cse1 (= (mod (div (* (- 2) main_~d~0) (- 2)) 2) 0) .cse14 .cse15 .cse4 (<= .cse23 .cse24) (< .cse24 .cse25)) (and .cse20 (= .cse5 (+ main_~r~0 .cse8)) (= main_~q~0 1) (<= .cse8 .cse24) (< .cse5 .cse23) .cse11) (and (< (+ .cse6 .cse22) .cse5) (= main_~q~0 3) .cse0 (= main_~d~0 .cse10) (= (+ main_~r~0 (* 3 .cse8)) .cse5) .cse4 .cse11) (and .cse20 .cse0 (< main_~r~0 .cse23) .cse15 (= .cse5 (+ main_~r~0 .cse23)) .cse4 .cse11) (and .cse21 (<= 1 .cse8) .cse15 (= .cse9 main_~d~0) .cse4 .cse18 (<= .cse25 main_~r~0)))))) [2022-03-20 15:34:30,904 INFO L878 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (let ((.cse8 (mod main_~B~0 4294967296))) (let ((.cse9 (* 8 .cse8)) (.cse18 (* .cse8 4)) (.cse15 (+ main_~d~0 main_~r~0)) (.cse21 (* (- 1) main_~d~0)) (.cse5 (mod main_~A~0 4294967296)) (.cse25 (* (- 1) main_~r~0))) (let ((.cse6 (* main_~r~0 2)) (.cse10 (div (+ .cse21 .cse5 .cse25) 2)) (.cse3 (div (+ .cse5 .cse25) 2)) (.cse7 (= main_~q~0 4)) (.cse17 (< main_~r~0 main_~d~0)) (.cse1 (= main_~p~0 2)) (.cse23 (= .cse15 .cse5)) (.cse2 (<= .cse18 .cse5)) (.cse24 (exists ((main_~A~0 Int)) (= main_~d~0 (* main_~p~0 (mod main_~B~0 4294967296))))) (.cse20 (= main_~p~0 4)) (.cse12 (< .cse5 .cse9)) (.cse14 (= main_~d~0 .cse8)) (.cse0 (<= 0 main_~r~0)) (.cse16 (* 2 .cse8)) (.cse11 (= main_~p~0 1)) (.cse22 (= main_~d~0 (* main_~p~0 .cse8))) (.cse13 (= (+ main_~r~0 (* main_~q~0 .cse8)) .cse5)) (.cse4 (<= .cse5 5)) (.cse19 (= main_~q~0 0))) (or (and .cse0 .cse1 .cse2 (= main_~d~0 .cse3) .cse4 (= (mod (div (- (div (+ (* (- 2) .cse5) .cse6) (- 2))) (- 2)) 2) 0) .cse7 (< (div (+ (* (- 4) .cse8) 5) (- 4294967296)) (+ (div (+ (- 1) .cse9) 4294967296) 1)) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and (= (+ main_~p~0 4) main_~q~0) .cse0 .cse4 (= .cse5 (+ (* 5 .cse8) main_~r~0)) (= (div .cse10 2) main_~d~0) .cse11 .cse12) (and (< (+ .cse6 (* main_~d~0 2)) .cse5) .cse0 (= main_~d~0 .cse10) .cse13 (= (+ main_~r~0 (* 3 .cse8)) .cse5) .cse4 .cse11) (and .cse14 (= .cse5 (+ (* (mod main_~d~0 4294967296) main_~q~0) main_~r~0)) (= main_~q~0 1) (<= .cse8 .cse15) (< .cse5 .cse16) .cse11) (and .cse17 (= .cse18 main_~d~0) .cse13 .cse4 .cse19 .cse20 (<= (div .cse21 (- 2)) main_~r~0)) (and .cse14 .cse13 .cse19 .cse11) (and (= main_~d~0 (div .cse3 2)) (not (<= .cse9 .cse5)) .cse2 .cse13 .cse4 .cse7 .cse11) (and .cse17 .cse22 .cse1 .cse13 .cse19 (<= .cse8 main_~r~0)) (and .cse1 .cse23 .cse13 .cse4 .cse24 (<= .cse16 .cse15) (< .cse15 .cse18)) (and .cse23 .cse2 .cse13 .cse4 .cse24 .cse20 .cse12) (and .cse14 .cse0 (< main_~r~0 .cse16) .cse13 (= .cse5 (+ main_~r~0 .cse16)) .cse4 .cse11) (and .cse22 (<= 1 .cse8) .cse13 (= .cse9 main_~d~0) .cse4 .cse19 (<= .cse18 main_~r~0)))))) [2022-03-20 15:34:30,904 INFO L878 garLoopResultBuilder]: At program point L39(lines 36 44) the Hoare annotation is: (let ((.cse6 (mod main_~A~0 4294967296)) (.cse5 (mod main_~B~0 4294967296))) (let ((.cse4 (= main_~d~0 (* main_~p~0 .cse5))) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse5)) .cse6)) (.cse2 (<= .cse6 5)) (.cse3 (= main_~q~0 0)) (.cse0 (* .cse5 4))) (or (and (= .cse0 main_~d~0) (< (div (div (div (+ main_~d~0 (- 4)) 2) 2) (- 4294967296)) 1) .cse1 .cse2 .cse3 (= main_~p~0 4) (<= (div (* (- 1) main_~d~0) (- 2)) main_~r~0)) (and .cse4 .cse1 (< (div (+ (- 1) main_~d~0) (- 4294967296)) 1) .cse2 .cse3 (= main_~p~0 1)) (and .cse4 (= main_~p~0 2) .cse1 .cse2 .cse3 (<= .cse5 main_~r~0) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and .cse4 (<= 1 .cse5) .cse1 (= (* 8 .cse5) main_~d~0) .cse2 .cse3 (<= .cse0 main_~r~0))))) [2022-03-20 15:34:30,904 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse6 (mod main_~A~0 4294967296)) (.cse5 (mod main_~B~0 4294967296))) (let ((.cse4 (= main_~d~0 (* main_~p~0 .cse5))) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse5)) .cse6)) (.cse2 (<= .cse6 5)) (.cse3 (= main_~q~0 0)) (.cse0 (* .cse5 4))) (or (and (= .cse0 main_~d~0) (< (div (div (div (+ main_~d~0 (- 4)) 2) 2) (- 4294967296)) 1) .cse1 .cse2 .cse3 (= main_~p~0 4) (<= (div (* (- 1) main_~d~0) (- 2)) main_~r~0)) (and .cse4 .cse1 (< (div (+ (- 1) main_~d~0) (- 4294967296)) 1) .cse2 .cse3 (= main_~p~0 1)) (and .cse4 (= main_~p~0 2) .cse1 .cse2 .cse3 (<= .cse5 main_~r~0) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and .cse4 (<= 1 .cse5) .cse1 (= (* 8 .cse5) main_~d~0) .cse2 .cse3 (<= .cse0 main_~r~0))))) [2022-03-20 15:34:30,904 INFO L878 garLoopResultBuilder]: At program point L37-1(line 37) the Hoare annotation is: (let ((.cse6 (mod main_~A~0 4294967296)) (.cse5 (mod main_~B~0 4294967296))) (let ((.cse4 (= main_~d~0 (* main_~p~0 .cse5))) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse5)) .cse6)) (.cse2 (<= .cse6 5)) (.cse3 (= main_~q~0 0)) (.cse0 (* .cse5 4))) (or (and (= .cse0 main_~d~0) (< (div (div (div (+ main_~d~0 (- 4)) 2) 2) (- 4294967296)) 1) .cse1 .cse2 .cse3 (= main_~p~0 4) (<= (div (* (- 1) main_~d~0) (- 2)) main_~r~0)) (and .cse4 .cse1 (< (div (+ (- 1) main_~d~0) (- 4294967296)) 1) .cse2 .cse3 (= main_~p~0 1)) (and .cse4 (= main_~p~0 2) .cse1 .cse2 .cse3 (<= .cse5 main_~r~0) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and .cse4 (<= 1 .cse5) .cse1 (= (* 8 .cse5) main_~d~0) .cse2 .cse3 (<= .cse0 main_~r~0))))) [2022-03-20 15:34:30,904 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 15:34:30,904 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 15:34:30,904 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 15:34:30,904 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 15:34:30,904 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 15:34:30,904 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 15:34:30,905 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 15:34:30,905 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 15:34:30,905 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 15:34:30,905 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-20 15:34:30,905 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 15:34:30,905 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 15:34:30,905 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 15:34:30,907 INFO L719 BasicCegarLoop]: Path program histogram: [14, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-20 15:34:30,908 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 15:34:30,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:34:30 BoogieIcfgContainer [2022-03-20 15:34:30,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 15:34:30,919 INFO L158 Benchmark]: Toolchain (without parser) took 414175.01ms. Allocated memory was 178.3MB in the beginning and 306.2MB in the end (delta: 127.9MB). Free memory was 125.8MB in the beginning and 214.6MB in the end (delta: -88.8MB). Peak memory consumption was 162.4MB. Max. memory is 8.0GB. [2022-03-20 15:34:30,919 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 178.3MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 15:34:30,919 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.34ms. Allocated memory is still 178.3MB. Free memory was 125.6MB in the beginning and 150.3MB in the end (delta: -24.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 15:34:30,919 INFO L158 Benchmark]: Boogie Preprocessor took 26.78ms. Allocated memory is still 178.3MB. Free memory was 150.3MB in the beginning and 148.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 15:34:30,919 INFO L158 Benchmark]: RCFGBuilder took 229.64ms. Allocated memory is still 178.3MB. Free memory was 148.7MB in the beginning and 138.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 15:34:30,920 INFO L158 Benchmark]: TraceAbstraction took 413721.31ms. Allocated memory was 178.3MB in the beginning and 306.2MB in the end (delta: 127.9MB). Free memory was 137.7MB in the beginning and 214.6MB in the end (delta: -76.9MB). Peak memory consumption was 173.5MB. Max. memory is 8.0GB. [2022-03-20 15:34:30,920 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 178.3MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.34ms. Allocated memory is still 178.3MB. Free memory was 125.6MB in the beginning and 150.3MB in the end (delta: -24.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.78ms. Allocated memory is still 178.3MB. Free memory was 150.3MB in the beginning and 148.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 229.64ms. Allocated memory is still 178.3MB. Free memory was 148.7MB in the beginning and 138.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 413721.31ms. Allocated memory was 178.3MB in the beginning and 306.2MB in the end (delta: 127.9MB). Free memory was 137.7MB in the beginning and 214.6MB in the end (delta: -76.9MB). Peak memory consumption was 173.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 413.7s, OverallIterations: 20, TraceHistogramMax: 21, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.1s, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 23.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 521 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 424 mSDsluCounter, 5879 SdHoareTripleChecker+Invalid, 6.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 40 IncrementalHoareTripleChecker+Unchecked, 4930 mSDsCounter, 527 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4341 IncrementalHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 527 mSolverCounterUnsat, 949 mSDtfsCounter, 4341 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3105 GetRequests, 2754 SyntacticMatches, 31 SemanticMatches, 320 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 91.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=18, InterpolantAutomatonStates: 200, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 37 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 798 PreInvPairs, 1086 NumberOfFragments, 3857 HoareAnnotationTreeSize, 798 FomulaSimplifications, 1592 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 38 FomulaSimplificationsInter, 9869 FormulaSimplificationTreeSizeReductionInter, 23.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((((B % 4294967296 * 4 == d && (d + -4) / 2 / 2 / -4294967296 < 1) && r + q * (B % 4294967296) == A % 4294967296) && A % 4294967296 <= 5) && q == 0) && p == 4) && -1 * d / -2 <= r) || (((((d == p * (B % 4294967296) && r + q * (B % 4294967296) == A % 4294967296) && (-1 + d) / -4294967296 < 1) && A % 4294967296 <= 5) && q == 0) && p == 1)) || ((((((d == p * (B % 4294967296) && p == 2) && r + q * (B % 4294967296) == A % 4294967296) && A % 4294967296 <= 5) && q == 0) && B % 4294967296 <= r) && (-2 + d) / 2 / -4294967296 < 1)) || ((((((d == p * (B % 4294967296) && 1 <= B % 4294967296) && r + q * (B % 4294967296) == A % 4294967296) && 8 * (B % 4294967296) == d) && A % 4294967296 <= 5) && q == 0) && B % 4294967296 * 4 <= r) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-20 15:34:31,123 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...