/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/prodbin-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:38:02,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:38:02,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:38:02,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:38:02,316 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 [2022-03-19 23:38:02,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:38:02,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:38:02,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:38:02,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:38:02,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:38:02,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:38:02,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:38:02,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:38:02,332 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:38:02,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:38:02,332 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:38:02,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:38:02,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:38:02,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:38:02,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:38:02,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:38:02,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:38:02,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:38:02,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:38:02,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:38:02,335 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:38:02,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:38:02,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:38:02,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:38:02,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:38:02,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:38:02,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:38:02,541 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:38:02,543 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:38:02,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin-ll.c [2022-03-19 23:38:02,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7092ad3f9/d760d9250c0244faa718134044648fe8/FLAG3260c065a [2022-03-19 23:38:02,960 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:38:02,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin-ll.c [2022-03-19 23:38:02,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7092ad3f9/d760d9250c0244faa718134044648fe8/FLAG3260c065a [2022-03-19 23:38:02,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7092ad3f9/d760d9250c0244faa718134044648fe8 [2022-03-19 23:38:02,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:38:02,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:38:02,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:38:02,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:38:02,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:38:02,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:38:02" (1/1) ... [2022-03-19 23:38:02,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad163ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:02, skipping insertion in model container [2022-03-19 23:38:02,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:38:02" (1/1) ... [2022-03-19 23:38:02,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:38:02,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:38:03,115 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/prodbin-ll.c[537,550] [2022-03-19 23:38:03,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:38:03,131 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:38:03,141 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/prodbin-ll.c[537,550] [2022-03-19 23:38:03,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:38:03,160 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:38:03,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:03 WrapperNode [2022-03-19 23:38:03,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:38:03,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:38:03,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:38:03,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:38:03,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:03" (1/1) ... [2022-03-19 23:38:03,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:03" (1/1) ... [2022-03-19 23:38:03,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:03" (1/1) ... [2022-03-19 23:38:03,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:03" (1/1) ... [2022-03-19 23:38:03,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:03" (1/1) ... [2022-03-19 23:38:03,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:03" (1/1) ... [2022-03-19 23:38:03,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:03" (1/1) ... [2022-03-19 23:38:03,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:38:03,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:38:03,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:38:03,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:38:03,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:03" (1/1) ... [2022-03-19 23:38:03,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:38:03,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:38:03,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 23:38:03,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 23:38:03,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:38:03,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:38:03,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:38:03,238 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 23:38:03,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:38:03,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:38:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:38:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:38:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:38:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:38:03,284 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:38:03,286 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:38:03,398 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:38:03,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:38:03,402 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 23:38:03,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:38:03 BoogieIcfgContainer [2022-03-19 23:38:03,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:38:03,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:38:03,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:38:03,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:38:03,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:38:02" (1/3) ... [2022-03-19 23:38:03,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6dafa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:38:03, skipping insertion in model container [2022-03-19 23:38:03,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:38:03" (2/3) ... [2022-03-19 23:38:03,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6dafa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:38:03, skipping insertion in model container [2022-03-19 23:38:03,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:38:03" (3/3) ... [2022-03-19 23:38:03,420 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2022-03-19 23:38:03,423 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:38:03,423 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:38:03,453 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:38:03,463 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 [2022-03-19 23:38:03,463 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:38:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 23:38:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 23:38:03,483 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:38:03,484 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:38:03,484 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:38:03,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:38:03,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2112761405, now seen corresponding path program 1 times [2022-03-19 23:38:03,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:38:03,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617269180] [2022-03-19 23:38:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:38:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:38:03,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:38:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:38:03,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:38:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:38:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:38:03,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:38:03,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617269180] [2022-03-19 23:38:03,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617269180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:38:03,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:38:03,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:38:03,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702282874] [2022-03-19 23:38:03,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:38:03,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:38:03,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:38:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:38:03,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:38:03,699 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:38:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:38:03,738 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-03-19 23:38:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:38:03,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 23:38:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:38:03,749 INFO L225 Difference]: With dead ends: 49 [2022-03-19 23:38:03,749 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 23:38:03,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:38:03,755 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:38:03,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:38:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 23:38:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-19 23:38:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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) [2022-03-19 23:38:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-19 23:38:03,784 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-03-19 23:38:03,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:38:03,784 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-19 23:38:03,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:38:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-19 23:38:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 23:38:03,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:38:03,785 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:38:03,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:38:03,786 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:38:03,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:38:03,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1500360061, now seen corresponding path program 1 times [2022-03-19 23:38:03,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:38:03,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829407763] [2022-03-19 23:38:03,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:03,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:38:03,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:38:03,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362969020] [2022-03-19 23:38:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:03,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:38:03,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:38:03,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:38:03,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:38:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:38:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 23:38:03,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:38:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:38:03,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:38:03,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:38:03,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829407763] [2022-03-19 23:38:03,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:38:03,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362969020] [2022-03-19 23:38:03,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362969020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:38:03,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:38:03,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:38:03,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832273934] [2022-03-19 23:38:03,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:38:03,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:38:03,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:38:03,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:38:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:38:03,984 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:38:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:38:04,027 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-03-19 23:38:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:38:04,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 23:38:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:38:04,028 INFO L225 Difference]: With dead ends: 36 [2022-03-19 23:38:04,028 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 23:38:04,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:38:04,029 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:38:04,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 72 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:38:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 23:38:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-03-19 23:38:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 23:38:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-19 23:38:04,035 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-19 23:38:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:38:04,035 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-19 23:38:04,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:38:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-19 23:38:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 23:38:04,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:38:04,036 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:38:04,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:38:04,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:38:04,246 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:38:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:38:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash 966896435, now seen corresponding path program 1 times [2022-03-19 23:38:04,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:38:04,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402492804] [2022-03-19 23:38:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:04,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:38:04,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:38:04,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866568742] [2022-03-19 23:38:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:04,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:38:04,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:38:04,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:38:04,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:38:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:38:04,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:38:04,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:38:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:38:04,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:38:04,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:38:04,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402492804] [2022-03-19 23:38:04,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:38:04,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866568742] [2022-03-19 23:38:04,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866568742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:38:04,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:38:04,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 23:38:04,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428659262] [2022-03-19 23:38:04,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:38:04,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:38:04,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:38:04,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:38:04,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:38:04,405 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:38:04,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:38:04,468 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-03-19 23:38:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:38:04,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 23:38:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:38:04,470 INFO L225 Difference]: With dead ends: 40 [2022-03-19 23:38:04,470 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 23:38:04,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:38:04,471 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:38:04,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 86 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:38:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 23:38:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-03-19 23:38:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 23:38:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-03-19 23:38:04,476 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2022-03-19 23:38:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:38:04,477 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-03-19 23:38:04,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:38:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-03-19 23:38:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 23:38:04,477 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:38:04,477 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, 1, 1] [2022-03-19 23:38:04,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:38:04,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 23:38:04,678 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:38:04,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:38:04,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1614734214, now seen corresponding path program 1 times [2022-03-19 23:38:04,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:38:04,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755983507] [2022-03-19 23:38:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:04,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:38:04,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:38:04,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528244212] [2022-03-19 23:38:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:04,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:38:04,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:38:04,697 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:38:04,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:38:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:38:04,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 23:38:04,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:38:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:38:06,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:38:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:38:06,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:38:06,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755983507] [2022-03-19 23:38:06,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:38:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528244212] [2022-03-19 23:38:06,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528244212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:38:06,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:38:06,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-03-19 23:38:06,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839671010] [2022-03-19 23:38:06,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:38:06,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 23:38:06,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:38:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 23:38:06,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:38:06,969 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 23:38:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:38:07,669 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-03-19 23:38:07,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 23:38:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2022-03-19 23:38:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:38:07,673 INFO L225 Difference]: With dead ends: 60 [2022-03-19 23:38:07,673 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 23:38:07,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-03-19 23:38:07,679 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:38:07,682 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 115 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:38:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 23:38:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-03-19 23:38:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 23:38:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-03-19 23:38:07,689 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 26 [2022-03-19 23:38:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:38:07,690 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-03-19 23:38:07,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 23:38:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-03-19 23:38:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 23:38:07,691 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:38:07,691 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:38:07,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:38:07,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:38:07,896 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:38:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:38:07,897 INFO L85 PathProgramCache]: Analyzing trace with hash 730472692, now seen corresponding path program 1 times [2022-03-19 23:38:07,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:38:07,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219040746] [2022-03-19 23:38:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:07,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:38:07,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:38:07,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137042449] [2022-03-19 23:38:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:07,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:38:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:38:07,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:38:07,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:38:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:38:07,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:38:07,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:38:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:38:08,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:38:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:38:08,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:38:08,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219040746] [2022-03-19 23:38:08,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:38:08,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137042449] [2022-03-19 23:38:08,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137042449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:38:08,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:38:08,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 23:38:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753388541] [2022-03-19 23:38:08,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:38:08,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:38:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:38:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:38:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:38:08,138 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 23:38:10,149 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 [] [2022-03-19 23:38:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:38:10,285 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-03-19 23:38:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:38:10,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2022-03-19 23:38:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:38:10,286 INFO L225 Difference]: With dead ends: 59 [2022-03-19 23:38:10,286 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 23:38:10,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:38:10,287 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:38:10,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 99 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 23:38:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 23:38:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-03-19 23:38:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 23:38:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-03-19 23:38:10,293 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 32 [2022-03-19 23:38:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:38:10,293 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-03-19 23:38:10,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 23:38:10,294 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-03-19 23:38:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 23:38:10,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:38:10,294 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:38:10,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:38:10,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:38:10,511 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:38:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:38:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2061371941, now seen corresponding path program 1 times [2022-03-19 23:38:10,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:38:10,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400335913] [2022-03-19 23:38:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:10,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:38:10,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:38:10,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058797177] [2022-03-19 23:38:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:10,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:38:10,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:38:10,520 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:38:10,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:38:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:38:10,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 23:38:10,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:38:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:38:18,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:38:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:38:27,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:38:27,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400335913] [2022-03-19 23:38:27,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:38:27,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058797177] [2022-03-19 23:38:27,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058797177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:38:27,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:38:27,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-03-19 23:38:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027399328] [2022-03-19 23:38:27,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:38:27,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:38:27,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:38:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:38:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=244, Unknown=2, NotChecked=0, Total=306 [2022-03-19 23:38:27,305 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:38:36,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:38:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:38:37,350 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-03-19 23:38:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 23:38:37,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-03-19 23:38:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:38:37,352 INFO L225 Difference]: With dead ends: 81 [2022-03-19 23:38:37,352 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 23:38:37,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=117, Invalid=481, Unknown=2, NotChecked=0, Total=600 [2022-03-19 23:38:37,353 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:38:37,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 178 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 153 Invalid, 0 Unknown, 24 Unchecked, 2.7s Time] [2022-03-19 23:38:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 23:38:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-03-19 23:38:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 23:38:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2022-03-19 23:38:37,368 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 35 [2022-03-19 23:38:37,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:38:37,368 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2022-03-19 23:38:37,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:38:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2022-03-19 23:38:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 23:38:37,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:38:37,370 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:38:37,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 23:38:37,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:38:37,571 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:38:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:38:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash 561979715, now seen corresponding path program 2 times [2022-03-19 23:38:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:38:37,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237015177] [2022-03-19 23:38:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:38:37,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:38:37,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:38:37,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481699788] [2022-03-19 23:38:37,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:38:37,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:38:37,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:38:37,580 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:38:37,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:38:37,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:38:37,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:38:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 23:38:37,628 INFO L286 TraceCheckSpWp]: Computing forward predicates...