/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/lcm1_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 08:36:40,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 08:36:40,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 08:36:40,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 08:36:40,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 08:36:40,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 08:36:40,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 08:36:40,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 08:36:40,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 08:36:40,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 08:36:40,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 08:36:40,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 08:36:40,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 08:36:40,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 08:36:40,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 08:36:40,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 08:36:40,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 08:36:40,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 08:36:40,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 08:36:40,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 08:36:40,140 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 08:36:40,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 08:36:40,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 08:36:40,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 08:36:40,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 08:36:40,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 08:36:40,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 08:36:40,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 08:36:40,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 08:36:40,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 08:36:40,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 08:36:40,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 08:36:40,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 08:36:40,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 08:36:40,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 08:36:40,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 08:36:40,186 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 08:36:40,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 08:36:40,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 08:36:40,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 08:36:40,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 08:36:40,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 08:36:40,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 08:36:40,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 08:36:40,187 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 08:36:40,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 08:36:40,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 08:36:40,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 08:36:40,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 08:36:40,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:36:40,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 08:36:40,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 08:36:40,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 08:36:40,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 08:36:40,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 08:36:40,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 08:36:40,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 08:36:40,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 08:36:40,192 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 08:36:40,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 08:36:40,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 08:36:40,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 08:36:40,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 08:36:40,372 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 08:36:40,375 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 08:36:40,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound20.c [2022-04-05 08:36:40,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08f1f907/3d38e283c41c453393a348f181a50a76/FLAGdeed9c61c [2022-04-05 08:36:40,759 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 08:36:40,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound20.c [2022-04-05 08:36:40,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08f1f907/3d38e283c41c453393a348f181a50a76/FLAGdeed9c61c [2022-04-05 08:36:41,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08f1f907/3d38e283c41c453393a348f181a50a76 [2022-04-05 08:36:41,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 08:36:41,208 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 08:36:41,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 08:36:41,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 08:36:41,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 08:36:41,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3b5f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41, skipping insertion in model container [2022-04-05 08:36:41,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 08:36:41,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 08:36:41,340 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/lcm1_valuebound20.c[552,565] [2022-04-05 08:36:41,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:36:41,355 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 08:36:41,363 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/lcm1_valuebound20.c[552,565] [2022-04-05 08:36:41,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:36:41,376 INFO L208 MainTranslator]: Completed translation [2022-04-05 08:36:41,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41 WrapperNode [2022-04-05 08:36:41,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 08:36:41,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 08:36:41,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 08:36:41,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 08:36:41,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 08:36:41,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 08:36:41,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 08:36:41,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 08:36:41,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:36:41,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:36:41,428 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) [2022-04-05 08:36:41,465 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 [2022-04-05 08:36:41,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 08:36:41,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 08:36:41,481 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 08:36:41,481 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 08:36:41,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 08:36:41,481 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 08:36:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 08:36:41,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 08:36:41,483 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 08:36:41,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 08:36:41,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 08:36:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 08:36:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 08:36:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 08:36:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 08:36:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 08:36:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 08:36:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 08:36:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 08:36:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 08:36:41,525 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 08:36:41,526 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 08:36:41,614 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 08:36:41,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 08:36:41,618 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 08:36:41,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:36:41 BoogieIcfgContainer [2022-04-05 08:36:41,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 08:36:41,620 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 08:36:41,620 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 08:36:41,620 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 08:36:41,622 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:36:41" (1/1) ... [2022-04-05 08:36:41,623 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 08:36:41,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:36:41 BasicIcfg [2022-04-05 08:36:41,641 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 08:36:41,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 08:36:41,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 08:36:41,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 08:36:41,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 08:36:41" (1/4) ... [2022-04-05 08:36:41,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b2de9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:36:41, skipping insertion in model container [2022-04-05 08:36:41,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:36:41" (2/4) ... [2022-04-05 08:36:41,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b2de9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:36:41, skipping insertion in model container [2022-04-05 08:36:41,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:36:41" (3/4) ... [2022-04-05 08:36:41,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b2de9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 08:36:41, skipping insertion in model container [2022-04-05 08:36:41,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:36:41" (4/4) ... [2022-04-05 08:36:41,656 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound20.cqvasr [2022-04-05 08:36:41,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 08:36:41,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 08:36:41,700 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 08:36:41,704 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 [2022-04-05 08:36:41,704 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 08:36:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 08:36:41,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 08:36:41,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:36:41,718 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:36:41,719 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:36:41,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:36:41,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2059041159, now seen corresponding path program 1 times [2022-04-05 08:36:41,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:36:41,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214967544] [2022-04-05 08:36:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:36:41,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:36:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:36:41,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 08:36:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:36:41,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 08:36:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:36:41,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 08:36:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:36:41,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 08:36:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:36:41,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 08:36:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:36:41,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 08:36:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:36:41,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 08:36:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:36:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 08:36:41,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:36:41,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214967544] [2022-04-05 08:36:41,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214967544] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:36:41,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:36:41,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 08:36:41,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701559363] [2022-04-05 08:36:41,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:36:41,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 08:36:41,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:36:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 08:36:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:36:41,906 INFO L87 Difference]: Start difference. First operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 08:36:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:36:41,967 INFO L93 Difference]: Finished difference Result 73 states and 121 transitions. [2022-04-05 08:36:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 08:36:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-05 08:36:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:36:41,974 INFO L225 Difference]: With dead ends: 73 [2022-04-05 08:36:41,974 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 08:36:41,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:36:41,978 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:36:41,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:36:41,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 08:36:42,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 08:36:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 08:36:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-04-05 08:36:42,003 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-04-05 08:36:42,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:36:42,003 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-04-05 08:36:42,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 08:36:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-04-05 08:36:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 08:36:42,005 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:36:42,005 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:36:42,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 08:36:42,005 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:36:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:36:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1255008874, now seen corresponding path program 1 times [2022-04-05 08:36:42,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:36:42,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580219196] [2022-04-05 08:36:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:36:42,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:36:42,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:36:42,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519372007] [2022-04-05 08:36:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:36:42,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:36:42,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:36:42,027 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) [2022-04-05 08:36:42,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 08:36:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:36:42,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 08:36:42,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:36:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 08:36:42,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:36:42,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:36:42,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580219196] [2022-04-05 08:36:42,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:36:42,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519372007] [2022-04-05 08:36:42,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519372007] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:36:42,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:36:42,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 08:36:42,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219556917] [2022-04-05 08:36:42,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:36:42,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 08:36:42,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:36:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 08:36:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:36:42,270 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-05 08:36:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:36:42,357 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-04-05 08:36:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:36:42,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-04-05 08:36:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:36:42,359 INFO L225 Difference]: With dead ends: 52 [2022-04-05 08:36:42,359 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 08:36:42,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:36:42,360 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:36:42,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 131 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:36:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 08:36:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-04-05 08:36:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 08:36:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-04-05 08:36:42,370 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 43 [2022-04-05 08:36:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:36:42,370 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-04-05 08:36:42,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-05 08:36:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-04-05 08:36:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 08:36:42,371 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:36:42,371 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:36:42,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 08:36:42,587 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 [2022-04-05 08:36:42,588 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:36:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:36:42,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1780836073, now seen corresponding path program 1 times [2022-04-05 08:36:42,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:36:42,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325417650] [2022-04-05 08:36:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:36:42,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:36:42,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:36:42,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174476820] [2022-04-05 08:36:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:36:42,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:36:42,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:36:42,609 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) [2022-04-05 08:36:42,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process