/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/geo2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:28:44,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:28:44,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:28:44,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:28:44,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:28:44,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:28:44,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:28:44,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:28:44,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:28:44,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:28:44,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:28:44,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:28:44,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:28:44,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:28:44,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:28:44,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:28:44,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:28:44,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:28:44,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:28:44,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:28:44,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:28:44,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:28:44,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:28:44,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:28:44,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:28:44,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:28:44,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:28:44,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:28:44,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:28:44,308 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:28:44,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:28:44,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:28:44,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:28:44,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:28:44,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:28:44,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:28:44,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:28:44,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:28:44,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:28:44,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:28:44,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:28:44,313 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:28:44,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:28:44,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:28:44,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:28:44,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:28:44,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:28:44,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:28:44,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:28:44,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:28:44,315 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:28:44,316 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:28:44,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:28:44,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:28:44,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:28:44,651 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:28:44,651 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:28:44,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound20.c [2021-05-06 08:28:44,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618db819f/6eb75e35e4fa4db0b5a6f12d016044f8/FLAGa7b9ce3b0 [2021-05-06 08:28:45,088 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:28:45,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound20.c [2021-05-06 08:28:45,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618db819f/6eb75e35e4fa4db0b5a6f12d016044f8/FLAGa7b9ce3b0 [2021-05-06 08:28:45,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618db819f/6eb75e35e4fa4db0b5a6f12d016044f8 [2021-05-06 08:28:45,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:28:45,525 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:28:45,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:28:45,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:28:45,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:28:45,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:28:45" (1/1) ... [2021-05-06 08:28:45,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603fcc79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45, skipping insertion in model container [2021-05-06 08:28:45,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:28:45" (1/1) ... [2021-05-06 08:28:45,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:28:45,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:28:45,646 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/geo2-ll_unwindbound20.c[525,538] [2021-05-06 08:28:45,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:28:45,663 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:28:45,699 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/geo2-ll_unwindbound20.c[525,538] [2021-05-06 08:28:45,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:28:45,728 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:28:45,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45 WrapperNode [2021-05-06 08:28:45,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:28:45,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:28:45,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:28:45,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:28:45,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45" (1/1) ... [2021-05-06 08:28:45,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45" (1/1) ... [2021-05-06 08:28:45,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45" (1/1) ... [2021-05-06 08:28:45,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45" (1/1) ... [2021-05-06 08:28:45,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45" (1/1) ... [2021-05-06 08:28:45,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45" (1/1) ... [2021-05-06 08:28:45,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45" (1/1) ... [2021-05-06 08:28:45,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:28:45,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:28:45,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:28:45,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:28:45,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45" (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 08:28:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:28:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:28:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:28:45,820 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:28:45,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:28:45,820 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:28:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:28:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:28:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:28:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:28:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:28:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:28:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:28:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:28:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:28:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:28:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:28:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:28:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:28:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:28:46,051 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:28:46,051 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:28:46,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:28:46 BoogieIcfgContainer [2021-05-06 08:28:46,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:28:46,053 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:28:46,053 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:28:46,054 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:28:46,056 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:28:46" (1/1) ... [2021-05-06 08:28:46,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:28:46 BasicIcfg [2021-05-06 08:28:46,083 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:28:46,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:28:46,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:28:46,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:28:46,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:28:45" (1/4) ... [2021-05-06 08:28:46,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c38c37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:28:46, skipping insertion in model container [2021-05-06 08:28:46,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:45" (2/4) ... [2021-05-06 08:28:46,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c38c37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:28:46, skipping insertion in model container [2021-05-06 08:28:46,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:28:46" (3/4) ... [2021-05-06 08:28:46,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c38c37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:28:46, skipping insertion in model container [2021-05-06 08:28:46,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:28:46" (4/4) ... [2021-05-06 08:28:46,088 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound20.cJordan [2021-05-06 08:28:46,109 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:28:46,112 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:28:46,142 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:28:46,157 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:28:46,157 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:28:46,157 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:28:46,157 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:28:46,158 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:28:46,158 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:28:46,158 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:28:46,158 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:28:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:28:46,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 08:28:46,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:46,174 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:46,174 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:46,178 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-06 08:28:46,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:46,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395115210] [2021-05-06 08:28:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:46,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:28:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:46,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:46,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395115210] [2021-05-06 08:28:46,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395115210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:28:46,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:28:46,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:28:46,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610202810] [2021-05-06 08:28:46,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:28:46,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:46,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:28:46,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:28:46,416 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:46,481 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-06 08:28:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:28:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 08:28:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:46,491 INFO L225 Difference]: With dead ends: 23 [2021-05-06 08:28:46,491 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 08:28:46,492 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:28:46,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 08:28:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 08:28:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 08:28:46,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 08:28:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:46,518 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 08:28:46,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 08:28:46,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:28:46,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:46,521 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:46,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:28:46,522 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:46,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-06 08:28:46,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:46,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71957813] [2021-05-06 08:28:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:46,536 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:46,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294643238] [2021-05-06 08:28:46,536 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 08:28:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:46,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:28:46,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:46,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:46,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:46,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:46,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:46,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:46,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:46,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71957813] [2021-05-06 08:28:46,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:46,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294643238] [2021-05-06 08:28:46,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294643238] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:28:46,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:28:46,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:28:46,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056120566] [2021-05-06 08:28:46,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:28:46,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:46,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:28:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:28:46,724 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:46,732 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 08:28:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:28:46,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:28:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:46,733 INFO L225 Difference]: With dead ends: 19 [2021-05-06 08:28:46,733 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 08:28:46,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:28:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 08:28:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 08:28:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 08:28:46,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 08:28:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:46,737 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 08:28:46,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 08:28:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:28:46,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:46,738 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:46,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:28:46,961 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:46,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:46,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-06 08:28:46,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:46,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195620086] [2021-05-06 08:28:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:46,971 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:46,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105130597] [2021-05-06 08:28:46,971 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 08:28:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:47,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:28:47,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:47,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:47,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:47,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195620086] [2021-05-06 08:28:47,080 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:47,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105130597] [2021-05-06 08:28:47,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105130597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:28:47,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:28:47,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:28:47,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672586715] [2021-05-06 08:28:47,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:28:47,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:47,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:28:47,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:28:47,082 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:47,114 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 08:28:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:28:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:28:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:47,116 INFO L225 Difference]: With dead ends: 26 [2021-05-06 08:28:47,116 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:28:47,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:28:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:28:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:28:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 08:28:47,121 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 08:28:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:47,121 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 08:28:47,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 08:28:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:28:47,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:47,122 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:47,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:47,329 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-06 08:28:47,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:47,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185339355] [2021-05-06 08:28:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:47,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:47,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807446557] [2021-05-06 08:28:47,337 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 08:28:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:28:47,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:47,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:47,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:47,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185339355] [2021-05-06 08:28:47,485 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:47,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807446557] [2021-05-06 08:28:47,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807446557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:47,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:47,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:28:47,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447347129] [2021-05-06 08:28:47,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:28:47,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:47,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:28:47,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:28:47,487 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:47,507 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-06 08:28:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:28:47,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:28:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:47,508 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:28:47,508 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:28:47,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:28:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:28:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:28:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 08:28:47,511 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 08:28:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:47,512 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 08:28:47,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 08:28:47,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:28:47,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:47,513 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:47,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:47,729 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-06 08:28:47,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:47,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615278106] [2021-05-06 08:28:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:47,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:47,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70796933] [2021-05-06 08:28:47,737 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 [2021-05-06 08:28:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:47,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:28:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:47,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:47,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:47,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615278106] [2021-05-06 08:28:47,851 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:47,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70796933] [2021-05-06 08:28:47,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70796933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:47,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:47,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:28:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539590437] [2021-05-06 08:28:47,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:28:47,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:47,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:28:47,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:47,853 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:47,896 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 08:28:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:28:47,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:28:47,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:47,898 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:28:47,898 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:28:47,898 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:28:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:28:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:28:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:28:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 08:28:47,901 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 08:28:47,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:47,902 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 08:28:47,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 08:28:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:28:47,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:47,903 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:48,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:48,109 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:48,109 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-06 08:28:48,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:48,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831510913] [2021-05-06 08:28:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:48,116 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:48,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831778704] [2021-05-06 08:28:48,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:48,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:28:48,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:28:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:48,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:48,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:48,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831510913] [2021-05-06 08:28:48,301 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:48,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831778704] [2021-05-06 08:28:48,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831778704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:48,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:48,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:28:48,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634459639] [2021-05-06 08:28:48,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:28:48,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:48,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:28:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:48,303 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:28:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:48,343 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-06 08:28:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:28:48,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:28:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:48,345 INFO L225 Difference]: With dead ends: 35 [2021-05-06 08:28:48,345 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:28:48,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:28:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:28:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:28:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:28:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 08:28:48,358 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 08:28:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:48,359 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 08:28:48,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:28:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 08:28:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:28:48,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:48,360 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:48,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:28:48,569 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-06 08:28:48,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:48,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857345368] [2021-05-06 08:28:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:48,588 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:48,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098451264] [2021-05-06 08:28:48,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:48,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:28:48,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:28:48,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:49,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:49,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:49,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:49,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:49,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:49,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:49,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:49,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:49,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:28:49,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:49,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857345368] [2021-05-06 08:28:49,220 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:49,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098451264] [2021-05-06 08:28:49,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098451264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:49,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:49,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:28:49,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942339132] [2021-05-06 08:28:49,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:28:49,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:49,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:28:49,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:28:49,222 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:29:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:29:19,795 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-06 08:29:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:29:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:29:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:29:19,796 INFO L225 Difference]: With dead ends: 42 [2021-05-06 08:29:19,797 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 08:29:19,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:29:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 08:29:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 08:29:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:29:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 08:29:19,800 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 08:29:19,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:29:19,801 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 08:29:19,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:29:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 08:29:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:29:19,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:29:19,802 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:29:20,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:29:20,016 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:29:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:29:20,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-06 08:29:20,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:29:20,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367659197] [2021-05-06 08:29:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:29:20,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:29:20,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52264122] [2021-05-06 08:29:20,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:29:20,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:29:20,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:29:20,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:29:20,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:29:20,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:29:20,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:29:20,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367659197] [2021-05-06 08:29:20,388 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:29:20,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52264122] [2021-05-06 08:29:20,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52264122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:29:20,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:29:20,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:29:20,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368197319] [2021-05-06 08:29:20,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:29:20,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:29:20,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:29:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:29:20,390 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)