/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 22:58:32,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 22:58:32,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 22:58:32,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 22:58:32,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 22:58:32,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 22:58:32,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 22:58:32,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 22:58:32,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 22:58:32,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 22:58:32,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 22:58:32,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 22:58:32,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 22:58:32,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 22:58:32,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 22:58:32,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 22:58:32,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 22:58:32,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 22:58:32,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 22:58:32,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 22:58:32,828 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 22:58:32,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 22:58:32,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 22:58:32,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 22:58:32,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 22:58:32,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 22:58:32,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 22:58:32,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 22:58:32,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 22:58:32,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 22:58:32,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 22:58:32,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 22:58:32,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 22:58:32,876 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 22:58:32,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 22:58:32,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 22:58:32,877 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 22:58:32,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 22:58:32,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 22:58:32,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 22:58:32,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 22:58:32,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 22:58:32,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 22:58:32,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 22:58:32,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 22:58:32,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 22:58:32,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 22:58:32,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 22:58:32,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 22:58:32,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:58:32,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 22:58:32,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 22:58:32,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 22:58:32,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 22:58:32,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 22:58:32,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 22:58:32,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 22:58:32,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 22:58:32,881 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 22:58:32,881 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 22:58:33,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 22:58:33,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 22:58:33,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 22:58:33,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 22:58:33,042 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 22:58:33,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2022-03-18 22:58:33,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec24abb81/e99a30c3bcfb43e594bd164cf628deea/FLAGdc1308e1c [2022-03-18 22:58:33,494 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 22:58:33,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2022-03-18 22:58:33,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec24abb81/e99a30c3bcfb43e594bd164cf628deea/FLAGdc1308e1c [2022-03-18 22:58:33,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec24abb81/e99a30c3bcfb43e594bd164cf628deea [2022-03-18 22:58:33,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 22:58:33,868 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 22:58:33,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 22:58:33,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 22:58:33,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 22:58:33,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:58:33" (1/1) ... [2022-03-18 22:58:33,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3493c8f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:33, skipping insertion in model container [2022-03-18 22:58:33,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:58:33" (1/1) ... [2022-03-18 22:58:33,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 22:58:33,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 22:58:33,988 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/bresenham-ll_unwindbound50.c[597,610] [2022-03-18 22:58:34,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:58:34,013 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 22:58:34,021 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/bresenham-ll_unwindbound50.c[597,610] [2022-03-18 22:58:34,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:58:34,033 INFO L208 MainTranslator]: Completed translation [2022-03-18 22:58:34,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:34 WrapperNode [2022-03-18 22:58:34,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 22:58:34,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 22:58:34,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 22:58:34,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 22:58:34,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:34" (1/1) ... [2022-03-18 22:58:34,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:34" (1/1) ... [2022-03-18 22:58:34,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:34" (1/1) ... [2022-03-18 22:58:34,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:34" (1/1) ... [2022-03-18 22:58:34,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:34" (1/1) ... [2022-03-18 22:58:34,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:34" (1/1) ... [2022-03-18 22:58:34,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:34" (1/1) ... [2022-03-18 22:58:34,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 22:58:34,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 22:58:34,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 22:58:34,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 22:58:34,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:34" (1/1) ... [2022-03-18 22:58:34,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:58:34,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:58:34,071 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) [2022-03-18 22:58:34,083 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 [2022-03-18 22:58:34,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 22:58:34,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 22:58:34,106 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 22:58:34,106 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 22:58:34,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 22:58:34,107 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 22:58:34,107 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 22:58:34,107 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 22:58:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 22:58:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 22:58:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 22:58:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 22:58:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 22:58:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 22:58:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 22:58:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 22:58:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 22:58:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 22:58:34,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 22:58:34,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 22:58:34,152 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 22:58:34,153 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 22:58:34,240 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 22:58:34,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 22:58:34,244 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 22:58:34,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:58:34 BoogieIcfgContainer [2022-03-18 22:58:34,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 22:58:34,245 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 22:58:34,245 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 22:58:34,251 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 22:58:34,253 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:58:34" (1/1) ... [2022-03-18 22:58:34,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:58:34 BasicIcfg [2022-03-18 22:58:34,265 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 22:58:34,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 22:58:34,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 22:58:34,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 22:58:34,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:58:33" (1/4) ... [2022-03-18 22:58:34,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4365ab14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:58:34, skipping insertion in model container [2022-03-18 22:58:34,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:58:34" (2/4) ... [2022-03-18 22:58:34,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4365ab14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:58:34, skipping insertion in model container [2022-03-18 22:58:34,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:58:34" (3/4) ... [2022-03-18 22:58:34,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4365ab14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:58:34, skipping insertion in model container [2022-03-18 22:58:34,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:58:34" (4/4) ... [2022-03-18 22:58:34,284 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound50.cqvasr [2022-03-18 22:58:34,315 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 22:58:34,315 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 22:58:34,344 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 22:58:34,348 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=FINITE_AUTOMATA, 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 [2022-03-18 22:58:34,348 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 22:58:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 22:58:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 22:58:34,372 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:58:34,372 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:58:34,373 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:58:34,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:58:34,378 INFO L85 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2022-03-18 22:58:34,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:58:34,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067247404] [2022-03-18 22:58:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:34,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:58:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:58:34,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:58:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:58:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:58:34,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:58:34,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067247404] [2022-03-18 22:58:34,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067247404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:58:34,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:58:34,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 22:58:34,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278936981] [2022-03-18 22:58:34,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:58:34,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 22:58:34,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:58:34,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 22:58:34,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:58:34,550 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:58:34,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:58:34,600 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-03-18 22:58:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 22:58:34,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 22:58:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:58:34,607 INFO L225 Difference]: With dead ends: 45 [2022-03-18 22:58:34,608 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 22:58:34,610 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:58:34,613 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:58:34,614 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:58:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 22:58:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-18 22:58:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 22:58:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-18 22:58:34,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-03-18 22:58:34,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:58:34,635 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-18 22:58:34,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:58:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-18 22:58:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 22:58:34,636 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:58:34,636 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:58:34,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 22:58:34,637 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:58:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:58:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2022-03-18 22:58:34,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:58:34,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715283183] [2022-03-18 22:58:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:34,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:58:34,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:58:34,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077883003] [2022-03-18 22:58:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:34,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:34,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:58:34,650 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) [2022-03-18 22:58:34,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 22:58:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:58:34,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 22:58:34,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:58:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:58:34,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:58:34,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:58:34,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715283183] [2022-03-18 22:58:34,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:58:34,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077883003] [2022-03-18 22:58:34,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077883003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:58:34,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:58:34,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 22:58:34,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459627279] [2022-03-18 22:58:34,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:58:34,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 22:58:34,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:58:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 22:58:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 22:58:34,808 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:58:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:58:34,887 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-18 22:58:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 22:58:34,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 22:58:34,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:58:34,891 INFO L225 Difference]: With dead ends: 34 [2022-03-18 22:58:34,891 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 22:58:34,892 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 22:58:34,892 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:58:34,893 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:58:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 22:58:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-18 22:58:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 22:58:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-18 22:58:34,901 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-03-18 22:58:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:58:34,901 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-18 22:58:34,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:58:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-18 22:58:34,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 22:58:34,902 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:58:34,902 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:58:34,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 22:58:35,108 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 [2022-03-18 22:58:35,108 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:58:35,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:58:35,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2022-03-18 22:58:35,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:58:35,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892967841] [2022-03-18 22:58:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:35,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:58:35,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:58:35,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390930462] [2022-03-18 22:58:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:35,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:35,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:58:35,126 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) [2022-03-18 22:58:35,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 22:58:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:58:35,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 22:58:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:58:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:58:35,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:58:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 22:58:35,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:58:35,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892967841] [2022-03-18 22:58:35,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:58:35,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390930462] [2022-03-18 22:58:35,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390930462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:58:35,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:58:35,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-18 22:58:35,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526066972] [2022-03-18 22:58:35,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:58:35,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 22:58:35,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:58:35,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 22:58:35,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 22:58:35,498 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 22:58:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:58:35,704 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-03-18 22:58:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 22:58:35,704 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-03-18 22:58:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:58:35,705 INFO L225 Difference]: With dead ends: 45 [2022-03-18 22:58:35,705 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 22:58:35,706 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-18 22:58:35,706 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:58:35,706 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 110 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:58:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 22:58:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-18 22:58:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 22:58:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-18 22:58:35,712 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-03-18 22:58:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:58:35,712 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-18 22:58:35,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 22:58:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-18 22:58:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 22:58:35,713 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:58:35,713 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:58:35,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 22:58:35,929 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 [2022-03-18 22:58:35,930 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:58:35,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:58:35,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2022-03-18 22:58:35,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:58:35,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495272660] [2022-03-18 22:58:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:35,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:58:35,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:58:35,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479831049] [2022-03-18 22:58:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:35,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:35,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:58:35,952 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) [2022-03-18 22:58:35,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 22:58:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:58:35,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 22:58:35,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:58:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:58:36,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:58:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:58:36,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:58:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495272660] [2022-03-18 22:58:36,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:58:36,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479831049] [2022-03-18 22:58:36,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479831049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:58:36,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:58:36,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 22:58:36,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349997406] [2022-03-18 22:58:36,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:58:36,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 22:58:36,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:58:36,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 22:58:36,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 22:58:36,130 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 22:58:36,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:58:36,186 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-03-18 22:58:36,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 22:58:36,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-03-18 22:58:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:58:36,189 INFO L225 Difference]: With dead ends: 77 [2022-03-18 22:58:36,189 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 22:58:36,190 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 22:58:36,193 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:58:36,194 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:58:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 22:58:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-03-18 22:58:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 22:58:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-03-18 22:58:36,210 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-03-18 22:58:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:58:36,211 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-03-18 22:58:36,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 22:58:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-03-18 22:58:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 22:58:36,212 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:58:36,212 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:58:36,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 22:58:36,427 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 [2022-03-18 22:58:36,427 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:58:36,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:58:36,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2022-03-18 22:58:36,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:58:36,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131123120] [2022-03-18 22:58:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:36,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:58:36,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:58:36,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121077021] [2022-03-18 22:58:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:36,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:36,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:58:36,445 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) [2022-03-18 22:58:36,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 22:58:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:58:36,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 22:58:36,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:58:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:58:36,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:58:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:58:37,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:58:37,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131123120] [2022-03-18 22:58:37,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:58:37,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121077021] [2022-03-18 22:58:37,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121077021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:58:37,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:58:37,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-18 22:58:37,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485197752] [2022-03-18 22:58:37,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:58:37,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 22:58:37,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:58:37,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 22:58:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-18 22:58:37,071 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:58:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:58:37,537 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-03-18 22:58:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 22:58:37,538 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-03-18 22:58:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:58:37,539 INFO L225 Difference]: With dead ends: 85 [2022-03-18 22:58:37,539 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 22:58:37,539 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 22:58:37,540 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:58:37,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 167 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 173 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-03-18 22:58:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 22:58:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-03-18 22:58:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 22:58:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-03-18 22:58:37,549 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-03-18 22:58:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:58:37,549 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-03-18 22:58:37,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:58:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-03-18 22:58:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 22:58:37,550 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:58:37,550 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:58:37,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 22:58:37,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:37,767 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:58:37,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:58:37,767 INFO L85 PathProgramCache]: Analyzing trace with hash -782335822, now seen corresponding path program 1 times [2022-03-18 22:58:37,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:58:37,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596768852] [2022-03-18 22:58:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:37,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:58:37,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:58:37,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223039248] [2022-03-18 22:58:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:37,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:37,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:58:37,807 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) [2022-03-18 22:58:37,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 22:58:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:58:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 22:58:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:58:37,981 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 22:58:37,983 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 22:58:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 22:58:40,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:58:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 22:58:40,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:58:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596768852] [2022-03-18 22:58:40,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:58:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223039248] [2022-03-18 22:58:40,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223039248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:58:40,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:58:40,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-03-18 22:58:40,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720682193] [2022-03-18 22:58:40,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:58:40,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 22:58:40,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:58:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 22:58:40,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2022-03-18 22:58:40,648 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 22:58:42,814 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 [] [2022-03-18 22:58:46,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 22:58:48,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 22:58:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:58:51,010 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-03-18 22:58:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 22:58:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-03-18 22:58:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:58:51,012 INFO L225 Difference]: With dead ends: 96 [2022-03-18 22:58:51,012 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 22:58:51,012 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=117, Invalid=432, Unknown=3, NotChecked=0, Total=552 [2022-03-18 22:58:51,013 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:58:51,013 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 183 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 181 Invalid, 3 Unknown, 0 Unchecked, 6.1s Time] [2022-03-18 22:58:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 22:58:51,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-18 22:58:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 22:58:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-03-18 22:58:51,027 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-03-18 22:58:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:58:51,031 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-03-18 22:58:51,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 22:58:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-03-18 22:58:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 22:58:51,041 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:58:51,041 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:58:51,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 22:58:51,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:51,256 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:58:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:58:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1435422131, now seen corresponding path program 1 times [2022-03-18 22:58:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:58:51,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16930898] [2022-03-18 22:58:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:51,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:58:51,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:58:51,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235428695] [2022-03-18 22:58:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:51,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:51,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:58:51,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:58:51,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 22:58:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:58:51,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 22:58:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:58:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 22:58:51,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:58:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 22:58:51,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:58:51,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16930898] [2022-03-18 22:58:51,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:58:51,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235428695] [2022-03-18 22:58:51,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235428695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:58:51,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:58:51,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-18 22:58:51,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351804505] [2022-03-18 22:58:51,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:58:51,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 22:58:51,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:58:51,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 22:58:51,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 22:58:51,691 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 22:58:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:58:51,803 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-03-18 22:58:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 22:58:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39 [2022-03-18 22:58:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:58:51,804 INFO L225 Difference]: With dead ends: 97 [2022-03-18 22:58:51,804 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 22:58:51,805 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-18 22:58:51,805 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:58:51,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:58:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 22:58:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-03-18 22:58:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 22:58:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-03-18 22:58:51,817 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-03-18 22:58:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:58:51,818 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-03-18 22:58:51,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 22:58:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-03-18 22:58:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 22:58:51,819 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:58:51,819 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:58:51,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 22:58:52,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:52,037 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:58:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:58:52,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1628716144, now seen corresponding path program 2 times [2022-03-18 22:58:52,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:58:52,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420798145] [2022-03-18 22:58:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:52,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:58:52,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:58:52,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332390227] [2022-03-18 22:58:52,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:58:52,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:52,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:58:52,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:58:52,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 22:58:52,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:58:52,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:58:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 22:58:52,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:58:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:58:52,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:58:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:58:52,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:58:52,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420798145] [2022-03-18 22:58:52,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:58:52,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332390227] [2022-03-18 22:58:52,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332390227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:58:52,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:58:52,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 22:58:52,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877974230] [2022-03-18 22:58:52,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:58:52,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 22:58:52,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:58:52,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 22:58:52,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-18 22:58:52,456 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 22:58:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:58:52,586 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-03-18 22:58:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 22:58:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-03-18 22:58:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:58:52,587 INFO L225 Difference]: With dead ends: 108 [2022-03-18 22:58:52,587 INFO L226 Difference]: Without dead ends: 102 [2022-03-18 22:58:52,587 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-18 22:58:52,588 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:58:52,588 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 159 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:58:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-18 22:58:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-03-18 22:58:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 22:58:52,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-03-18 22:58:52,598 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-03-18 22:58:52,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:58:52,598 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-03-18 22:58:52,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 22:58:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-03-18 22:58:52,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 22:58:52,601 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:58:52,601 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:58:52,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 22:58:52,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:52,818 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:58:52,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:58:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1136439088, now seen corresponding path program 3 times [2022-03-18 22:58:52,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:58:52,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037406263] [2022-03-18 22:58:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:58:52,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:58:52,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:58:52,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7750273] [2022-03-18 22:58:52,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:58:52,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:58:52,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:58:52,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:58:52,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 22:58:53,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 22:58:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:58:53,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 22:58:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:58:53,532 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 22:58:53,537 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 22:58:53,539 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 22:58:59,620 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false