/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:08:06,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:08:06,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:08:06,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:08:06,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:08:06,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:08:06,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:08:06,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:08:06,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:08:06,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:08:06,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:08:06,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:08:06,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:08:06,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:08:06,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:08:06,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:08:06,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:08:06,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:08:06,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:08:06,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:08:06,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:08:06,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:08:06,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:08:06,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:08:06,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:08:06,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:08:06,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:08:06,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:08:06,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:08:06,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:08:06,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:08:06,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:08:06,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:08:06,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:08:06,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:08:06,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:08:06,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:08:06,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:08:06,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:08:06,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:08:06,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:08:06,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:08:06,187 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:08:06,187 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:08:06,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:08:06,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:08:06,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:08:06,591 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:08:06,592 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:08:06,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c [2021-05-06 09:08:06,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de73c1dcc/92ad83b7591f46039a001b4b09914e3a/FLAGa1253828e [2021-05-06 09:08:07,089 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:08:07,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c [2021-05-06 09:08:07,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de73c1dcc/92ad83b7591f46039a001b4b09914e3a/FLAGa1253828e [2021-05-06 09:08:07,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de73c1dcc/92ad83b7591f46039a001b4b09914e3a [2021-05-06 09:08:07,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:08:07,519 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:08:07,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:08:07,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:08:07,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:08:07,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:08:07" (1/1) ... [2021-05-06 09:08:07,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e20d3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07, skipping insertion in model container [2021-05-06 09:08:07,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:08:07" (1/1) ... [2021-05-06 09:08:07,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:08:07,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:08:07,677 WARN L224 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/hard-u_valuebound5.c[545,558] [2021-05-06 09:08:07,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:08:07,704 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:08:07,714 WARN L224 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/hard-u_valuebound5.c[545,558] [2021-05-06 09:08:07,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:08:07,752 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:08:07,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07 WrapperNode [2021-05-06 09:08:07,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:08:07,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:08:07,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:08:07,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:08:07,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07" (1/1) ... [2021-05-06 09:08:07,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07" (1/1) ... [2021-05-06 09:08:07,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07" (1/1) ... [2021-05-06 09:08:07,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07" (1/1) ... [2021-05-06 09:08:07,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07" (1/1) ... [2021-05-06 09:08:07,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07" (1/1) ... [2021-05-06 09:08:07,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07" (1/1) ... [2021-05-06 09:08:07,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:08:07,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:08:07,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:08:07,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:08:07,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:08:07,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:08:07,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:08:07,918 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:08:07,918 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:08:07,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:08:07,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:08:07,918 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:08:07,919 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:08:07,919 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:08:07,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:08:07,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 09:08:07,919 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:08:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:08:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:08:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:08:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:08:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:08:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:08:07,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:08:07,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:08:08,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:08:08,228 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:08:08,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:08:08 BoogieIcfgContainer [2021-05-06 09:08:08,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:08:08,230 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:08:08,230 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:08:08,231 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:08:08,233 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:08:08" (1/1) ... [2021-05-06 09:08:08,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:08:08 BasicIcfg [2021-05-06 09:08:08,247 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:08:08,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:08:08,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:08:08,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:08:08,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:08:07" (1/4) ... [2021-05-06 09:08:08,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8b5e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:08:08, skipping insertion in model container [2021-05-06 09:08:08,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:07" (2/4) ... [2021-05-06 09:08:08,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8b5e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:08:08, skipping insertion in model container [2021-05-06 09:08:08,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:08:08" (3/4) ... [2021-05-06 09:08:08,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8b5e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:08:08, skipping insertion in model container [2021-05-06 09:08:08,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:08:08" (4/4) ... [2021-05-06 09:08:08,253 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound5.cJordan [2021-05-06 09:08:08,258 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:08:08,261 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:08:08,276 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:08:08,292 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:08:08,292 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:08:08,292 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:08:08,292 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:08:08,292 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:08:08,293 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:08:08,293 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:08:08,293 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:08:08,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:08:08,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:08:08,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:08,322 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:08:08,322 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:08,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 09:08:08,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:08,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561906928] [2021-05-06 09:08:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:08,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:08:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:08,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:08:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:08,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:08:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:08,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:08:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:08:08,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:08,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561906928] [2021-05-06 09:08:08,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561906928] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:08:08,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:08:08,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:08:08,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208984112] [2021-05-06 09:08:08,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:08:08,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:08,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:08:08,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:08:08,697 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:08:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:08,846 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 09:08:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:08:08,848 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 09:08:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:08,854 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:08:08,854 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 09:08:08,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:08:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 09:08:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 09:08:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:08:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 09:08:08,893 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 09:08:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:08,894 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 09:08:08,894 INFO L481 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:08:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 09:08:08,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:08:08,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:08,896 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:08:08,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:08:08,896 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:08,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 09:08:08,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:08,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358685634] [2021-05-06 09:08:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:08:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:08:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:08:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:08:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:08:09,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:09,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358685634] [2021-05-06 09:08:09,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358685634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:08:09,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:08:09,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:08:09,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241022319] [2021-05-06 09:08:09,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:08:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:09,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:08:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:08:09,083 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:08:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:09,523 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 09:08:09,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:08:09,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 09:08:09,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:09,526 INFO L225 Difference]: With dead ends: 44 [2021-05-06 09:08:09,526 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 09:08:09,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:08:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 09:08:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 09:08:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:08:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 09:08:09,549 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 09:08:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:09,550 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 09:08:09,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:08:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 09:08:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:08:09,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:09,555 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:08:09,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:08:09,556 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:09,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 09:08:09,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:09,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472591525] [2021-05-06 09:08:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:08:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:08:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:08:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:08:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 09:08:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:08:09,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:09,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472591525] [2021-05-06 09:08:09,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472591525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:08:09,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:08:09,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:08:09,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939153140] [2021-05-06 09:08:09,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:08:09,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:08:09,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:08:09,816 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:08:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:10,156 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:08:10,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:08:10,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 09:08:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:10,158 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:08:10,158 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:08:10,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:08:10,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:08:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 09:08:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:08:10,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 09:08:10,171 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 09:08:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:10,172 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 09:08:10,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:08:10,173 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 09:08:10,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 09:08:10,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:10,175 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:08:10,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:08:10,175 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:10,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 09:08:10,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:10,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512795598] [2021-05-06 09:08:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:10,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:10,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403692468] [2021-05-06 09:08:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:10,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 09:08:10,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:08:10,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:10,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:10,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:10,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:10,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:10,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:10,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:10,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:10,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 09:08:10,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:10,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512795598] [2021-05-06 09:08:10,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:08:10,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403692468] [2021-05-06 09:08:10,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403692468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:08:10,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:08:10,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:08:10,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572200562] [2021-05-06 09:08:10,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:08:10,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:10,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:08:10,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:08:10,733 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 09:08:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:13,080 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-05-06 09:08:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:08:13,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 09:08:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:13,081 INFO L225 Difference]: With dead ends: 62 [2021-05-06 09:08:13,081 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 09:08:13,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:08:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 09:08:13,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 09:08:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 09:08:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 09:08:13,086 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 09:08:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:13,086 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 09:08:13,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 09:08:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 09:08:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 09:08:13,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:13,088 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-05-06 09:08:13,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:13,303 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:13,304 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 09:08:13,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:13,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577594216] [2021-05-06 09:08:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:13,314 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:13,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414757973] [2021-05-06 09:08:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:13,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 09:08:13,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:08:13,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 09:08:13,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:13,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577594216] [2021-05-06 09:08:13,714 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:08:13,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414757973] [2021-05-06 09:08:13,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414757973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:08:13,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:08:13,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:08:13,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428074819] [2021-05-06 09:08:13,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:08:13,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:13,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:08:13,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:08:13,717 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:08:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:14,048 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-05-06 09:08:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:08:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 09:08:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:14,050 INFO L225 Difference]: With dead ends: 74 [2021-05-06 09:08:14,050 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 09:08:14,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:08:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 09:08:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 09:08:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 09:08:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 09:08:14,059 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 09:08:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:14,060 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 09:08:14,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:08:14,060 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 09:08:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 09:08:14,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:14,067 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:08:14,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:14,268 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 09:08:14,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:14,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438929172] [2021-05-06 09:08:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:14,277 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:14,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982344891] [2021-05-06 09:08:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:14,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 09:08:14,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:08:14,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 09:08:14,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:14,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438929172] [2021-05-06 09:08:14,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:08:14,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982344891] [2021-05-06 09:08:14,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982344891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:08:14,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:08:14,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:08:14,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255806819] [2021-05-06 09:08:14,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:08:14,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:14,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:08:14,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:08:14,755 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:08:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:19,439 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 09:08:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:08:19,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 09:08:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:19,461 INFO L225 Difference]: With dead ends: 91 [2021-05-06 09:08:19,461 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 09:08:19,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:08:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 09:08:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 09:08:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 09:08:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 09:08:19,471 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 09:08:19,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:19,471 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 09:08:19,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:08:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 09:08:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 09:08:19,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:19,472 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:08:19,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:19,673 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:19,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2021-05-06 09:08:19,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:19,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839188432] [2021-05-06 09:08:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:19,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:19,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63099894] [2021-05-06 09:08:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true