/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:10:58,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:10:58,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:10:58,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 00:10:58,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 00:10:58,357 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:10:58,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:10:58,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:10:58,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:10:58,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:10:58,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:10:58,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:10:58,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:10:58,359 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:10:58,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:10:58,360 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:10:58,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:10:58,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:10:58,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:10:58,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:10:58,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:10:58,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:10:58,360 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:10:58,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:10:58,361 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:10:58,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:10:58,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:10:58,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:10:58,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:10:58,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:10:58,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:10:58,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:10:58,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:10:58,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:10:58,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:10:58,362 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:10:58,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:10:58,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:10:58,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:10:58,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:10:58,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:10:58,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:10:58,603 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:10:58,604 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:10:58,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound50.i [2022-03-20 00:10:58,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097df5ad1/9f47876d7da24cafb3ec06b2df42a995/FLAG4755a5939 [2022-03-20 00:10:59,071 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:10:59,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound50.i [2022-03-20 00:10:59,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097df5ad1/9f47876d7da24cafb3ec06b2df42a995/FLAG4755a5939 [2022-03-20 00:10:59,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097df5ad1/9f47876d7da24cafb3ec06b2df42a995 [2022-03-20 00:10:59,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:10:59,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:10:59,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:10:59,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:10:59,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:10:59,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:10:59" (1/1) ... [2022-03-20 00:10:59,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48e9ecbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59, skipping insertion in model container [2022-03-20 00:10:59,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:10:59" (1/1) ... [2022-03-20 00:10:59,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:10:59,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:10:59,268 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/divbin2_unwindbound50.i[951,964] [2022-03-20 00:10:59,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:10:59,295 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:10:59,313 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/divbin2_unwindbound50.i[951,964] [2022-03-20 00:10:59,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:10:59,341 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:10:59,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59 WrapperNode [2022-03-20 00:10:59,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:10:59,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:10:59,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:10:59,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:10:59,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59" (1/1) ... [2022-03-20 00:10:59,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59" (1/1) ... [2022-03-20 00:10:59,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59" (1/1) ... [2022-03-20 00:10:59,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59" (1/1) ... [2022-03-20 00:10:59,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59" (1/1) ... [2022-03-20 00:10:59,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59" (1/1) ... [2022-03-20 00:10:59,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59" (1/1) ... [2022-03-20 00:10:59,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:10:59,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:10:59,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:10:59,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:10:59,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59" (1/1) ... [2022-03-20 00:10:59,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:10:59,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:10:59,433 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 00:10:59,455 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 00:10:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:10:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:10:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:10:59,473 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:10:59,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:10:59,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:10:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:10:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:10:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 00:10:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 00:10:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:10:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:10:59,528 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:10:59,529 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:10:59,623 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:10:59,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:10:59,629 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 00:10:59,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:59 BoogieIcfgContainer [2022-03-20 00:10:59,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:10:59,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:10:59,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:10:59,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:10:59,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:10:59" (1/3) ... [2022-03-20 00:10:59,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab3b6ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:10:59, skipping insertion in model container [2022-03-20 00:10:59,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:59" (2/3) ... [2022-03-20 00:10:59,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab3b6ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:10:59, skipping insertion in model container [2022-03-20 00:10:59,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:59" (3/3) ... [2022-03-20 00:10:59,643 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound50.i [2022-03-20 00:10:59,647 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:10:59,647 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:10:59,689 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:10:59,697 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 00:10:59,698 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:10:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 00:10:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 00:10:59,735 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:10:59,735 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:10:59,736 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:10:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:10:59,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2022-03-20 00:10:59,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:10:59,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660067434] [2022-03-20 00:10:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:10:59,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:10:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:10:59,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:10:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:10:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:10:59,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:10:59,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660067434] [2022-03-20 00:10:59,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660067434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:10:59,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:10:59,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:10:59,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225699208] [2022-03-20 00:10:59,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:10:59,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:10:59,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:10:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:10:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:10:59,928 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:11:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:00,023 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-03-20 00:11:00,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:11:00,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 00:11:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:00,032 INFO L225 Difference]: With dead ends: 44 [2022-03-20 00:11:00,032 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 00:11:00,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 00:11:00,039 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:00,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:11:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 00:11:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 00:11:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 00:11:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-03-20 00:11:00,097 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-03-20 00:11:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:00,098 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-03-20 00:11:00,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:11:00,098 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-03-20 00:11:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 00:11:00,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:00,099 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:00,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:11:00,099 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:00,100 INFO L85 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2022-03-20 00:11:00,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:00,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593537952] [2022-03-20 00:11:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:00,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:00,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:11:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:00,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:00,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593537952] [2022-03-20 00:11:00,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593537952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:11:00,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:11:00,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 00:11:00,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126347534] [2022-03-20 00:11:00,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:11:00,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:11:00,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:11:00,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:11:00,210 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:11:00,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:00,296 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-03-20 00:11:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:11:00,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 00:11:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:00,298 INFO L225 Difference]: With dead ends: 35 [2022-03-20 00:11:00,298 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 00:11:00,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 00:11:00,301 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:00,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:11:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 00:11:00,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 00:11:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 00:11:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-03-20 00:11:00,307 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2022-03-20 00:11:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:00,307 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-03-20 00:11:00,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:11:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-03-20 00:11:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 00:11:00,308 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:00,308 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:00,308 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 00:11:00,309 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2022-03-20 00:11:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:00,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439717760] [2022-03-20 00:11:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:00,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:00,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:00,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216231107] [2022-03-20 00:11:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:00,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:00,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:00,329 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 00:11:00,339 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 00:11:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:00,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:11:00,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:00,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:11:00,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:00,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439717760] [2022-03-20 00:11:00,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:00,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216231107] [2022-03-20 00:11:00,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216231107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:11:00,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:11:00,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:11:00,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968872578] [2022-03-20 00:11:00,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:11:00,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:11:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:11:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:11:00,499 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:11:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:00,540 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-20 00:11:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:11:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 00:11:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:00,544 INFO L225 Difference]: With dead ends: 34 [2022-03-20 00:11:00,544 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 00:11:00,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:11:00,546 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:00,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 66 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:11:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 00:11:00,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 00:11:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 00:11:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-03-20 00:11:00,552 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-03-20 00:11:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:00,553 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-03-20 00:11:00,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:11:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-03-20 00:11:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 00:11:00,554 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:00,554 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:00,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 00:11:00,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:00,755 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:00,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:00,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1207346058, now seen corresponding path program 1 times [2022-03-20 00:11:00,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:00,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143407070] [2022-03-20 00:11:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:00,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:00,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:00,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721266557] [2022-03-20 00:11:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:00,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:00,779 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 00:11:00,781 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 00:11:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:00,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 00:11:00,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:00,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:11:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143407070] [2022-03-20 00:11:00,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721266557] [2022-03-20 00:11:00,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721266557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:11:00,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:11:00,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:11:00,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3132077] [2022-03-20 00:11:00,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:11:00,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:11:00,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:11:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:11:00,986 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:11:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:01,030 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-03-20 00:11:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:11:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 00:11:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:01,031 INFO L225 Difference]: With dead ends: 35 [2022-03-20 00:11:01,031 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 00:11:01,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-20 00:11:01,033 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:01,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:11:01,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 00:11:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 00:11:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 00:11:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-20 00:11:01,041 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2022-03-20 00:11:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:01,042 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-20 00:11:01,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:11:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-20 00:11:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 00:11:01,043 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:01,043 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:01,072 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 00:11:01,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 00:11:01,272 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 1 times [2022-03-20 00:11:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:01,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118561914] [2022-03-20 00:11:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:01,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:01,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:01,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159513737] [2022-03-20 00:11:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:01,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:01,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:01,303 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 00:11:01,304 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 00:11:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:01,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:11:01,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:01,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:11:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:01,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:01,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118561914] [2022-03-20 00:11:01,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:01,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159513737] [2022-03-20 00:11:01,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159513737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:11:01,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:11:01,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 00:11:01,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713859537] [2022-03-20 00:11:01,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:11:01,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 00:11:01,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 00:11:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:11:01,545 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:01,614 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-20 00:11:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 00:11:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 00:11:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:01,619 INFO L225 Difference]: With dead ends: 66 [2022-03-20 00:11:01,619 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 00:11:01,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:11:01,623 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:01,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 125 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:11:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 00:11:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2022-03-20 00:11:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 00:11:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-03-20 00:11:01,641 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 17 [2022-03-20 00:11:01,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:01,645 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-03-20 00:11:01,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-03-20 00:11:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 00:11:01,646 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:01,647 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:01,667 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 00:11:01,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:01,850 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:01,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:01,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1615882355, now seen corresponding path program 1 times [2022-03-20 00:11:01,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:01,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406017317] [2022-03-20 00:11:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:01,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:01,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665333874] [2022-03-20 00:11:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:01,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:01,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:01,868 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 00:11:01,873 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 00:11:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:01,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:11:01,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:01,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:11:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:02,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:02,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406017317] [2022-03-20 00:11:02,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:02,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665333874] [2022-03-20 00:11:02,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665333874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:11:02,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:11:02,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 00:11:02,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352546413] [2022-03-20 00:11:02,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:11:02,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:11:02,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:02,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:11:02,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:11:02,077 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:02,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:02,192 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2022-03-20 00:11:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 00:11:02,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 00:11:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:02,197 INFO L225 Difference]: With dead ends: 91 [2022-03-20 00:11:02,197 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 00:11:02,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:11:02,202 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:02,202 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 163 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:11:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 00:11:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2022-03-20 00:11:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 63 states have internal predecessors, (81), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 00:11:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2022-03-20 00:11:02,224 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 18 [2022-03-20 00:11:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:02,225 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2022-03-20 00:11:02,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2022-03-20 00:11:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 00:11:02,225 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:02,226 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:02,254 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 00:11:02,426 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:02,427 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:02,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1617669815, now seen corresponding path program 1 times [2022-03-20 00:11:02,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:02,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36707309] [2022-03-20 00:11:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:02,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:02,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:02,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264334125] [2022-03-20 00:11:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:02,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:02,452 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 00:11:02,454 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 00:11:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:02,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 00:11:02,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:02,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:11:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:02,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:02,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36707309] [2022-03-20 00:11:02,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:02,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264334125] [2022-03-20 00:11:02,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264334125] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:11:02,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:11:02,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-20 00:11:02,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759156199] [2022-03-20 00:11:02,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:11:02,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:11:02,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:02,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:11:02,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:11:02,845 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:11:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:02,873 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2022-03-20 00:11:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:11:02,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 00:11:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:02,878 INFO L225 Difference]: With dead ends: 110 [2022-03-20 00:11:02,878 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 00:11:02,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:11:02,882 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:02,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 104 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-03-20 00:11:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 00:11:02,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-03-20 00:11:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 89 states have internal predecessors, (104), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:11:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2022-03-20 00:11:02,911 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 18 [2022-03-20 00:11:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:02,911 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2022-03-20 00:11:02,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:11:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2022-03-20 00:11:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 00:11:02,912 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:02,913 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:02,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 00:11:03,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:03,114 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:03,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:03,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1627795671, now seen corresponding path program 1 times [2022-03-20 00:11:03,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:03,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783373285] [2022-03-20 00:11:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:03,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:03,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:03,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566917676] [2022-03-20 00:11:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:03,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:03,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:03,127 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 00:11:03,157 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 00:11:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:03,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:11:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:03,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:11:03,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:03,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783373285] [2022-03-20 00:11:03,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:03,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566917676] [2022-03-20 00:11:03,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566917676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:11:03,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:11:03,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:11:03,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999060231] [2022-03-20 00:11:03,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:11:03,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:11:03,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:11:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:11:03,239 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 00:11:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:03,255 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2022-03-20 00:11:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:11:03,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-20 00:11:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:03,257 INFO L225 Difference]: With dead ends: 148 [2022-03-20 00:11:03,257 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 00:11:03,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 00:11:03,259 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:03,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:11:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 00:11:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 00:11:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 77 states have internal predecessors, (91), 13 states have call successors, (13), 10 states have call predecessors, (13), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 00:11:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-03-20 00:11:03,286 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 24 [2022-03-20 00:11:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:03,286 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-03-20 00:11:03,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 00:11:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-03-20 00:11:03,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 00:11:03,290 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:03,290 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:03,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 00:11:03,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:03,508 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:03,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:03,508 INFO L85 PathProgramCache]: Analyzing trace with hash 145864044, now seen corresponding path program 1 times [2022-03-20 00:11:03,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:03,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154439998] [2022-03-20 00:11:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:03,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:03,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:03,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132548236] [2022-03-20 00:11:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:03,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:03,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:03,521 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 00:11:03,528 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 00:11:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:03,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 00:11:03,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 00:11:03,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:11:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 00:11:03,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:03,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154439998] [2022-03-20 00:11:03,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:03,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132548236] [2022-03-20 00:11:03,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132548236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:11:03,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:11:03,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-20 00:11:03,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956336794] [2022-03-20 00:11:03,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:11:03,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:11:03,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:03,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:11:03,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:11:03,775 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:05,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:11:07,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:11:10,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:11:10,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:10,321 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2022-03-20 00:11:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:11:10,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-03-20 00:11:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:10,323 INFO L225 Difference]: With dead ends: 108 [2022-03-20 00:11:10,323 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 00:11:10,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:11:10,324 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:10,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 120 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2022-03-20 00:11:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 00:11:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 00:11:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 00:11:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2022-03-20 00:11:10,332 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 24 [2022-03-20 00:11:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:10,332 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2022-03-20 00:11:10,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2022-03-20 00:11:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 00:11:10,333 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:10,333 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:10,375 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 00:11:10,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:10,534 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1815750730, now seen corresponding path program 1 times [2022-03-20 00:11:10,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:10,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765864271] [2022-03-20 00:11:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:10,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:10,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:10,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287139273] [2022-03-20 00:11:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:10,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:10,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:10,555 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 00:11:10,557 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 00:11:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:10,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 00:11:10,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:11,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:11:17,571 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~b~0 4294967296))) (or (= (mod c_main_~A~0 4294967296) (mod (+ (* (div .cse0 2) (* c_main_~q~0 2)) c_main_~r~0) 4294967296)) (<= .cse0 (mod c_main_~r~0 4294967296)))) is different from true [2022-03-20 00:11:38,794 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~b~0 2) 4294967296)) (.cse0 (mod c_main_~r~0 4294967296))) (or (not (<= (mod c_main_~b~0 4294967296) .cse0)) (= (mod c_main_~A~0 4294967296) (mod (+ (* (div .cse1 2) (* c_main_~q~0 2)) c_main_~r~0) 4294967296)) (<= .cse1 .cse0))) is different from true [2022-03-20 00:11:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-03-20 00:11:55,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:55,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765864271] [2022-03-20 00:11:55,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287139273] [2022-03-20 00:11:55,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287139273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:11:55,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:11:55,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-03-20 00:11:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262134311] [2022-03-20 00:11:55,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:11:55,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 00:11:55,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:55,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 00:11:55,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=82, Unknown=2, NotChecked=38, Total=156 [2022-03-20 00:11:55,940 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 00:12:02,380 WARN L232 SmtUtils]: Spent 6.38s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:12:04,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:06,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:08,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:10,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:12,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:14,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:17,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:19,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:20,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:12:20,472 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2022-03-20 00:12:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 00:12:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-03-20 00:12:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:12:20,473 INFO L225 Difference]: With dead ends: 130 [2022-03-20 00:12:20,473 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 00:12:20,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=46, Invalid=116, Unknown=2, NotChecked=46, Total=210 [2022-03-20 00:12:20,474 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:12:20,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 140 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 8 Unknown, 92 Unchecked, 18.1s Time] [2022-03-20 00:12:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 00:12:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-03-20 00:12:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 00:12:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2022-03-20 00:12:20,481 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 27 [2022-03-20 00:12:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:12:20,482 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2022-03-20 00:12:20,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 00:12:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2022-03-20 00:12:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 00:12:20,483 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:12:20,483 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:12:20,511 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 00:12:20,706 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,SelfDestructingSolverStorable9 [2022-03-20 00:12:20,707 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:12:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:12:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash -570721609, now seen corresponding path program 2 times [2022-03-20 00:12:20,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:12:20,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143896231] [2022-03-20 00:12:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:12:20,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:12:20,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:12:20,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785886809] [2022-03-20 00:12:20,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:12:20,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:12:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:12:20,721 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 00:12:20,722 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 00:12:20,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 00:12:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:12:20,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:12:20,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:12:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 00:12:20,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:12:20,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:12:20,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143896231] [2022-03-20 00:12:20,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:12:20,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785886809] [2022-03-20 00:12:20,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785886809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:12:20,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:12:20,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:12:20,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444870509] [2022-03-20 00:12:20,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:12:20,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:12:20,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:12:20,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:12:20,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:12:20,923 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:12:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:12:21,024 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-03-20 00:12:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:12:21,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 00:12:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:12:21,026 INFO L225 Difference]: With dead ends: 113 [2022-03-20 00:12:21,026 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 00:12:21,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:12:21,027 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:12:21,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:12:21,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 00:12:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2022-03-20 00:12:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 77 states have internal predecessors, (89), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 00:12:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2022-03-20 00:12:21,035 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 29 [2022-03-20 00:12:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:12:21,035 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2022-03-20 00:12:21,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 00:12:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2022-03-20 00:12:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 00:12:21,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:12:21,037 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:12:21,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 00:12:21,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:12:21,252 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:12:21,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:12:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2030398442, now seen corresponding path program 2 times [2022-03-20 00:12:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:12:21,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130133975] [2022-03-20 00:12:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:12:21,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:12:21,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:12:21,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548562282] [2022-03-20 00:12:21,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:12:21,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:12:21,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:12:21,269 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 00:12:21,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process