/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/dijkstra-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:56:10,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:56:10,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:56:10,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:56:10,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 23:56:10,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 23:56:10,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 23:56:10,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 23:56:10,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 23:56:10,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 23:56:10,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 23:56:10,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 23:56:10,224 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 23:56:10,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 23:56:10,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 23:56:10,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 23:56:10,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 23:56:10,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 23:56:10,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 23:56:10,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 23:56:10,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 23:56:10,244 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 23:56:10,271 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:56:10,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:56:10,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:56:10,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:56:10,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:56:10,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:56:10,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:56:10,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:56:10,272 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:56:10,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:56:10,273 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:56:10,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:56:10,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:56:10,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:56:10,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:56:10,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:56:10,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:56:10,274 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:56:10,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:56:10,274 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:56:10,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:56:10,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:56:10,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:56:10,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:56:10,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:56:10,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:56:10,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:56:10,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:56:10,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:56:10,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:56:10,275 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:56:10,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:56:10,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:56:10,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:56:10,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:56:10,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:56:10,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:56:10,484 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:56:10,484 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:56:10,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2022-03-19 23:56:10,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1ccd5e2/ee5362f00cb94f44a45f3e5a74865308/FLAG384e41b71 [2022-03-19 23:56:10,927 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:56:10,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2022-03-19 23:56:10,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1ccd5e2/ee5362f00cb94f44a45f3e5a74865308/FLAG384e41b71 [2022-03-19 23:56:10,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1ccd5e2/ee5362f00cb94f44a45f3e5a74865308 [2022-03-19 23:56:10,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:56:10,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:56:10,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:56:10,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:56:10,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:56:10,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:56:10" (1/1) ... [2022-03-19 23:56:10,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674052ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:10, skipping insertion in model container [2022-03-19 23:56:10,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:56:10" (1/1) ... [2022-03-19 23:56:10,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:56:10,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:56:11,187 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/dijkstra-u_valuebound1.c[525,538] [2022-03-19 23:56:11,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:56:11,237 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:56:11,249 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/dijkstra-u_valuebound1.c[525,538] [2022-03-19 23:56:11,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:56:11,277 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:56:11,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:11 WrapperNode [2022-03-19 23:56:11,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:56:11,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:56:11,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:56:11,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:56:11,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:11" (1/1) ... [2022-03-19 23:56:11,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:11" (1/1) ... [2022-03-19 23:56:11,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:11" (1/1) ... [2022-03-19 23:56:11,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:11" (1/1) ... [2022-03-19 23:56:11,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:11" (1/1) ... [2022-03-19 23:56:11,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:11" (1/1) ... [2022-03-19 23:56:11,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:11" (1/1) ... [2022-03-19 23:56:11,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:56:11,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:56:11,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:56:11,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:56:11,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:11" (1/1) ... [2022-03-19 23:56:11,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:56:11,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:11,330 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 23:56:11,349 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 23:56:11,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:56:11,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:56:11,369 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:56:11,370 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 23:56:11,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:56:11,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:56:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:56:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:56:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:56:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:56:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 23:56:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 23:56:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:56:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:56:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:56:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:56:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:56:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:56:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:56:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:56:11,419 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:56:11,420 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:56:11,551 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:56:11,570 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:56:11,570 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 23:56:11,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:56:11 BoogieIcfgContainer [2022-03-19 23:56:11,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:56:11,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:56:11,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:56:11,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:56:11,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:56:10" (1/3) ... [2022-03-19 23:56:11,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d981ad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:56:11, skipping insertion in model container [2022-03-19 23:56:11,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:11" (2/3) ... [2022-03-19 23:56:11,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d981ad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:56:11, skipping insertion in model container [2022-03-19 23:56:11,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:56:11" (3/3) ... [2022-03-19 23:56:11,577 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.c [2022-03-19 23:56:11,581 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:56:11,581 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:56:11,616 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:56:11,622 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 23:56:11,622 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:56:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 23:56:11,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 23:56:11,641 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:11,641 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] [2022-03-19 23:56:11,642 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2022-03-19 23:56:11,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:11,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839508187] [2022-03-19 23:56:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:11,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:11,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:56:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:11,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:56:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:11,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 23:56:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:56:11,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839508187] [2022-03-19 23:56:11,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839508187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:11,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:11,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:56:11,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818510747] [2022-03-19 23:56:11,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:11,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:56:11,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:56:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:56:11,945 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:56:14,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:16,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:16,402 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-03-19 23:56:16,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:56:16,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 23:56:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:16,410 INFO L225 Difference]: With dead ends: 69 [2022-03-19 23:56:16,410 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 23:56:16,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 23:56:16,415 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:16,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 10 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-03-19 23:56:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 23:56:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 23:56:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 23:56:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-03-19 23:56:16,447 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-03-19 23:56:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:16,447 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-03-19 23:56:16,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:56:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-03-19 23:56:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 23:56:16,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:16,449 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] [2022-03-19 23:56:16,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:56:16,450 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:16,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2022-03-19 23:56:16,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:16,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783127076] [2022-03-19 23:56:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:16,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:16,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:56:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:16,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:56:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:16,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 23:56:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:56:16,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:16,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783127076] [2022-03-19 23:56:16,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783127076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:16,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:16,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 23:56:16,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671500550] [2022-03-19 23:56:16,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:16,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 23:56:16,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 23:56:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 23:56:16,708 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:56:19,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:21,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:25,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:26,132 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-03-19 23:56:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 23:56:26,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-19 23:56:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:26,136 INFO L225 Difference]: With dead ends: 68 [2022-03-19 23:56:26,136 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 23:56:26,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:56:26,139 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 53 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:26,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 54 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 191 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2022-03-19 23:56:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 23:56:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 23:56:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 23:56:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-03-19 23:56:26,154 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-03-19 23:56:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:26,154 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-03-19 23:56:26,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:56:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-03-19 23:56:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 23:56:26,155 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:26,155 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, 1, 1] [2022-03-19 23:56:26,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:56:26,156 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:26,156 INFO L85 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2022-03-19 23:56:26,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:26,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93288707] [2022-03-19 23:56:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:26,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:26,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:56:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:26,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:56:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:26,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 23:56:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:56:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93288707] [2022-03-19 23:56:26,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93288707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:56:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399941167] [2022-03-19 23:56:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:26,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:26,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:26,439 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 23:56:26,440 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 23:56:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:26,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:56:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:56:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:56:26,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:56:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:56:27,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399941167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:56:27,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:56:27,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-19 23:56:27,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096300798] [2022-03-19 23:56:27,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:56:27,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 23:56:27,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:27,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 23:56:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-19 23:56:27,022 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 23:56:31,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:56:33,694 WARN L534 Checker$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 23:56:36,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:40,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:43,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:45,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:49,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:52,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:55,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:57,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:59,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:57:02,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:57:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:57:02,091 INFO L93 Difference]: Finished difference Result 82 states and 116 transitions. [2022-03-19 23:57:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 23:57:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 26 [2022-03-19 23:57:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:57:02,092 INFO L225 Difference]: With dead ends: 82 [2022-03-19 23:57:02,092 INFO L226 Difference]: Without dead ends: 62 [2022-03-19 23:57:02,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-03-19 23:57:02,094 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 138 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:57:02,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 93 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 473 Invalid, 11 Unknown, 0 Unchecked, 34.8s Time] [2022-03-19 23:57:02,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-19 23:57:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-03-19 23:57:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 23:57:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2022-03-19 23:57:02,109 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 26 [2022-03-19 23:57:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:57:02,110 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2022-03-19 23:57:02,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 23:57:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2022-03-19 23:57:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 23:57:02,111 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:57:02,111 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, 1, 1] [2022-03-19 23:57:02,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 23:57:02,333 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 [2022-03-19 23:57:02,334 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:57:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:57:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2000886032, now seen corresponding path program 1 times [2022-03-19 23:57:02,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:57:02,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100891171] [2022-03-19 23:57:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:02,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:57:02,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:57:02,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390342609] [2022-03-19 23:57:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:02,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:57:02,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:57:02,353 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 23:57:02,354 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 23:57:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:57:02,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:57:02,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:57:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:57:02,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:57:02,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:57:02,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100891171] [2022-03-19 23:57:02,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:57:02,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390342609] [2022-03-19 23:57:02,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390342609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:57:02,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:57:02,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:57:02,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559662380] [2022-03-19 23:57:02,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:57:02,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:57:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:57:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:57:02,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:57:02,547 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:57:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:57:03,280 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2022-03-19 23:57:03,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:57:03,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-19 23:57:03,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:57:03,282 INFO L225 Difference]: With dead ends: 70 [2022-03-19 23:57:03,282 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 23:57:03,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 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 23:57:03,283 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:57:03,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:57:03,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 23:57:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 23:57:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 23:57:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-03-19 23:57:03,292 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 34 [2022-03-19 23:57:03,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:57:03,292 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-03-19 23:57:03,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:57:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-03-19 23:57:03,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 23:57:03,293 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:57:03,293 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:57:03,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 23:57:03,497 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 [2022-03-19 23:57:03,497 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:57:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:57:03,498 INFO L85 PathProgramCache]: Analyzing trace with hash -965267381, now seen corresponding path program 1 times [2022-03-19 23:57:03,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:57:03,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087942314] [2022-03-19 23:57:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:03,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:57:03,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:57:03,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221949163] [2022-03-19 23:57:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:03,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:57:03,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:57:03,522 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 23:57:03,524 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 23:57:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:57:03,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:57:03,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:57:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 23:57:03,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:57:03,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:57:03,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087942314] [2022-03-19 23:57:03,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:57:03,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221949163] [2022-03-19 23:57:03,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221949163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:57:03,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:57:03,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:57:03,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986061169] [2022-03-19 23:57:03,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:57:03,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:57:03,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:57:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:57:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:57:03,726 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:57:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:57:04,145 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-03-19 23:57:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:57:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-19 23:57:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:57:04,147 INFO L225 Difference]: With dead ends: 57 [2022-03-19 23:57:04,147 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 23:57:04,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 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 23:57:04,148 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 5 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:57:04,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 166 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:57:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 23:57:04,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 23:57:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 23:57:04,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-19 23:57:04,155 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 36 [2022-03-19 23:57:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:57:04,156 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-19 23:57:04,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:57:04,156 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-19 23:57:04,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:57:04,157 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:57:04,157 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:57:04,162 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 23:57:04,361 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 [2022-03-19 23:57:04,362 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:57:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:57:04,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1670386034, now seen corresponding path program 1 times [2022-03-19 23:57:04,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:57:04,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445356136] [2022-03-19 23:57:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:04,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:57:04,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:57:04,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729934454] [2022-03-19 23:57:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:04,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:57:04,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:57:04,382 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 23:57:04,384 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 23:57:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:57:04,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 23:57:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:57:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-19 23:57:05,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:57:09,452 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~q~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 3 .cse0) (* 2 (div (mod c_main_~p~0 4294967296) 2))) 4294967296))) (= .cse1 1))) is different from false [2022-03-19 23:57:30,792 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~q~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 3 .cse0) (* 2 (div (mod c_main_~p~0 4294967296) 2))) 4294967296))) (<= .cse1 (mod c_main_~n~0 4294967296)) (= .cse1 1))) is different from false [2022-03-19 23:57:32,888 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~q~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 3 .cse0) (* 2 (div (mod c_main_~p~0 4294967296) 2))) 4294967296))) (<= .cse1 (mod c_main_~n~0 4294967296)) (= .cse1 1))) is different from true [2022-03-19 23:57:51,971 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~q~0 4) 4294967296)) (.cse2 (mod c_main_~n~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 2 (div (mod c_main_~p~0 4294967296) 2)) (* 3 .cse0)) 4294967296))) (<= .cse1 .cse2) (< .cse2 (mod c_main_~q~0 4294967296)))) is different from true [2022-03-19 23:58:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 4 not checked. [2022-03-19 23:58:02,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:58:02,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445356136] [2022-03-19 23:58:02,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:58:02,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729934454] [2022-03-19 23:58:02,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729934454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:58:02,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:58:02,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-03-19 23:58:02,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053040465] [2022-03-19 23:58:02,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:58:02,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 23:58:02,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:58:02,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 23:58:02,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=152, Unknown=4, NotChecked=78, Total=272 [2022-03-19 23:58:02,622 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-19 23:58:09,110 WARN L232 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 44 DAG size of output: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:58:31,318 WARN L232 SmtUtils]: Spent 22.19s on a formula simplification. DAG size of input: 43 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:58:34,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:58:39,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:58:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:58:39,633 INFO L93 Difference]: Finished difference Result 91 states and 123 transitions. [2022-03-19 23:58:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 23:58:39,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 59 [2022-03-19 23:58:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:58:39,635 INFO L225 Difference]: With dead ends: 91 [2022-03-19 23:58:39,637 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 23:58:39,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=58, Invalid=256, Unknown=4, NotChecked=102, Total=420 [2022-03-19 23:58:39,638 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 22 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:58:39,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 382 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 175 Invalid, 2 Unknown, 167 Unchecked, 8.3s Time] [2022-03-19 23:58:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 23:58:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2022-03-19 23:58:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.088235294117647) internal successors, (37), 36 states have internal predecessors, (37), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 23:58:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-03-19 23:58:39,659 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 59 [2022-03-19 23:58:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:58:39,660 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-03-19 23:58:39,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-19 23:58:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-03-19 23:58:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 23:58:39,661 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:58:39,661 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:58:39,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-19 23:58:39,861 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 [2022-03-19 23:58:39,861 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:58:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:58:39,862 INFO L85 PathProgramCache]: Analyzing trace with hash 825776884, now seen corresponding path program 2 times [2022-03-19 23:58:39,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:58:39,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687220554] [2022-03-19 23:58:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:58:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:58:39,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:58:39,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046918725] [2022-03-19 23:58:39,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:58:39,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:58:39,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:58:39,875 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 23:58:39,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process