/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/egcd3-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:40:55,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:40:55,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:40:55,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 00:40:55,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 00:40:55,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 00:40:55,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 00:40:55,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 00:40:55,571 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:40:55,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:40:55,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:40:55,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:40:55,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:40:55,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:40:55,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:40:55,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:40:55,573 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:40:55,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:40:55,574 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:40:55,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:40:55,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:40:55,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:40:55,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:40:55,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:40:55,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:40:55,575 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:40:55,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:40:55,576 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:40:55,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:40:55,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:40:55,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:40:55,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:40:55,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:40:55,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:40:55,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:40:55,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:40:55,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:40:55,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:40:55,577 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:40:55,577 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:40:55,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:40:55,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:40:55,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:40:55,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:40:55,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:40:55,793 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:40:55,793 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:40:55,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound1.c [2022-03-20 00:40:55,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91970c077/a7b0488eac434b5ab1d7072aa5372035/FLAGa3c890855 [2022-03-20 00:40:56,206 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:40:56,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound1.c [2022-03-20 00:40:56,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91970c077/a7b0488eac434b5ab1d7072aa5372035/FLAGa3c890855 [2022-03-20 00:40:56,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91970c077/a7b0488eac434b5ab1d7072aa5372035 [2022-03-20 00:40:56,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:40:56,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:40:56,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:40:56,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:40:56,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:40:56,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:40:56" (1/1) ... [2022-03-20 00:40:56,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424e1c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56, skipping insertion in model container [2022-03-20 00:40:56,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:40:56" (1/1) ... [2022-03-20 00:40:56,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:40:56,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:40:56,435 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound1.c[490,503] [2022-03-20 00:40:56,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:40:56,462 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:40:56,479 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound1.c[490,503] [2022-03-20 00:40:56,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:40:56,503 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:40:56,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56 WrapperNode [2022-03-20 00:40:56,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:40:56,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:40:56,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:40:56,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:40:56,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56" (1/1) ... [2022-03-20 00:40:56,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56" (1/1) ... [2022-03-20 00:40:56,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56" (1/1) ... [2022-03-20 00:40:56,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56" (1/1) ... [2022-03-20 00:40:56,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56" (1/1) ... [2022-03-20 00:40:56,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56" (1/1) ... [2022-03-20 00:40:56,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56" (1/1) ... [2022-03-20 00:40:56,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:40:56,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:40:56,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:40:56,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:40:56,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56" (1/1) ... [2022-03-20 00:40:56,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:40:56,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:56,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 00:40:56,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 00:40:56,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:40:56,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:40:56,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:40:56,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:40:56,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:40:56,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:40:56,572 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:40:56,572 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:40:56,572 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:40:56,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:40:56,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 00:40:56,573 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:40:56,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:40:56,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:40:56,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:40:56,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:40:56,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:40:56,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:40:56,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:40:56,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:40:56,643 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:40:56,644 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:40:56,736 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:40:56,740 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:40:56,740 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 00:40:56,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:40:56 BoogieIcfgContainer [2022-03-20 00:40:56,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:40:56,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:40:56,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:40:56,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:40:56,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:40:56" (1/3) ... [2022-03-20 00:40:56,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222e8fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:40:56, skipping insertion in model container [2022-03-20 00:40:56,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:56" (2/3) ... [2022-03-20 00:40:56,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222e8fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:40:56, skipping insertion in model container [2022-03-20 00:40:56,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:40:56" (3/3) ... [2022-03-20 00:40:56,746 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound1.c [2022-03-20 00:40:56,749 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:40:56,749 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:40:56,774 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:40:56,778 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 00:40:56,779 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:40:56,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 00:40:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 00:40:56,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:56,791 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:56,792 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:56,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2022-03-20 00:40:56,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:56,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808194616] [2022-03-20 00:40:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:56,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:56,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:40:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:56,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:40:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:56,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 00:40:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:40:56,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:56,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808194616] [2022-03-20 00:40:56,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808194616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:40:56,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:40:56,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:40:56,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911531400] [2022-03-20 00:40:56,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:40:56,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:40:56,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:56,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:40:56,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:40:56,946 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (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) [2022-03-20 00:40:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:57,025 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-03-20 00:40:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:40:57,027 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, (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 22 [2022-03-20 00:40:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:57,032 INFO L225 Difference]: With dead ends: 74 [2022-03-20 00:40:57,032 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 00:40:57,035 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 [2022-03-20 00:40:57,038 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:57,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:40:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 00:40:57,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 00:40:57,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 00:40:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-20 00:40:57,074 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-20 00:40:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:57,074 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-20 00:40:57,075 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, (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) [2022-03-20 00:40:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-20 00:40:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 00:40:57,076 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:57,077 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] [2022-03-20 00:40:57,077 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:40:57,078 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:57,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:57,078 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2022-03-20 00:40:57,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:57,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482576061] [2022-03-20 00:40:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:57,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:57,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:57,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873111015] [2022-03-20 00:40:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:57,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:57,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:57,094 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:57,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 00:40:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:57,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:40:57,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:40:57,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:40:57,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482576061] [2022-03-20 00:40:57,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873111015] [2022-03-20 00:40:57,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873111015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:40:57,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:40:57,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 00:40:57,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895444851] [2022-03-20 00:40:57,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:40:57,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 00:40:57,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 00:40:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 00:40:57,247 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:40:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:57,259 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-03-20 00:40:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 00:40:57,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 00:40:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:57,260 INFO L225 Difference]: With dead ends: 44 [2022-03-20 00:40:57,260 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 00:40:57,260 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 00:40:57,261 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:57,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:40:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 00:40:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 00:40:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 00:40:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-20 00:40:57,267 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-20 00:40:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:57,268 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-20 00:40:57,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:40:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-20 00:40:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 00:40:57,269 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:57,269 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:57,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:57,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:57,486 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2022-03-20 00:40:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:57,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396519537] [2022-03-20 00:40:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:57,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:57,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972143667] [2022-03-20 00:40:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:57,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:57,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:57,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:57,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 00:40:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:40:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 00:40:57,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:40:57,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:57,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396519537] [2022-03-20 00:40:57,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:57,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972143667] [2022-03-20 00:40:57,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972143667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:40:57,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:40:57,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:40:57,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693199752] [2022-03-20 00:40:57,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:40:57,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:40:57,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:40:57,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:40:57,667 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:40:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:57,722 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-03-20 00:40:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:40:57,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-20 00:40:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:57,724 INFO L225 Difference]: With dead ends: 57 [2022-03-20 00:40:57,724 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 00:40:57,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:40:57,725 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:57,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:40:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 00:40:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-03-20 00:40:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 00:40:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-03-20 00:40:57,731 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-03-20 00:40:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:57,732 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-03-20 00:40:57,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:40:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-03-20 00:40:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 00:40:57,733 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:57,733 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, 1, 1, 1] [2022-03-20 00:40:57,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:57,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 00:40:57,951 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:57,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:57,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2022-03-20 00:40:57,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:57,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736750192] [2022-03-20 00:40:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:57,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:57,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:57,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289709119] [2022-03-20 00:40:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:57,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:57,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:57,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 00:40:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 00:40:58,072 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 00:40:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 00:40:58,120 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 00:40:58,120 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 00:40:58,121 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 00:40:58,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:58,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:58,347 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-03-20 00:40:58,349 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 00:40:58,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:40:58 BoogieIcfgContainer [2022-03-20 00:40:58,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 00:40:58,372 INFO L158 Benchmark]: Toolchain (without parser) took 2146.42ms. Allocated memory was 160.4MB in the beginning and 192.9MB in the end (delta: 32.5MB). Free memory was 110.2MB in the beginning and 155.0MB in the end (delta: -44.9MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 00:40:58,372 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 160.4MB. Free memory is still 126.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 00:40:58,372 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.42ms. Allocated memory is still 160.4MB. Free memory was 109.9MB in the beginning and 136.7MB in the end (delta: -26.8MB). Peak memory consumption was 8.1MB. Max. memory is 8.0GB. [2022-03-20 00:40:58,373 INFO L158 Benchmark]: Boogie Preprocessor took 17.21ms. Allocated memory is still 160.4MB. Free memory was 136.7MB in the beginning and 135.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 00:40:58,373 INFO L158 Benchmark]: RCFGBuilder took 219.07ms. Allocated memory is still 160.4MB. Free memory was 135.3MB in the beginning and 123.6MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 00:40:58,373 INFO L158 Benchmark]: TraceAbstraction took 1629.31ms. Allocated memory was 160.4MB in the beginning and 192.9MB in the end (delta: 32.5MB). Free memory was 122.8MB in the beginning and 155.0MB in the end (delta: -32.3MB). Peak memory consumption was 1.1MB. Max. memory is 8.0GB. [2022-03-20 00:40:58,374 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 160.4MB. Free memory is still 126.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 276.42ms. Allocated memory is still 160.4MB. Free memory was 109.9MB in the beginning and 136.7MB in the end (delta: -26.8MB). Peak memory consumption was 8.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.21ms. Allocated memory is still 160.4MB. Free memory was 136.7MB in the beginning and 135.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 219.07ms. Allocated memory is still 160.4MB. Free memory was 135.3MB in the beginning and 123.6MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1629.31ms. Allocated memory was 160.4MB in the beginning and 192.9MB in the end (delta: 32.5MB). Free memory was 122.8MB in the beginning and 155.0MB in the end (delta: -32.3MB). Peak memory consumption was 1.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=4, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=1, y=2] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=1, y=2] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=1, b=2, counter=0, p=1, q=0, r=0, s=1, x=1, y=2] [L34] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=1, y=2] [L34] COND TRUE counter++<1 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=1, b=2, c=1, counter=1, k=0, p=1, q=0, r=0, s=1, x=1, y=2] [L41] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=1, y=2] [L41] COND FALSE !(counter++<1) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, y=2] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, y=2] [L34] COND FALSE !(counter++<1) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 62 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 56 mSDsluCounter, 333 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 202 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 76 IncrementalHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 131 mSDtfsCounter, 76 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 125 SizeOfPredicates, 3 NumberOfNonLiveVariables, 200 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 12/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 00:40:58,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...