/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:38:11,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:38:11,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:38:11,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:38:11,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:38:11,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:38:11,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:38:11,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:38:11,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:38:11,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:38:11,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:38:11,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:38:11,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:38:11,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:38:11,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:38:11,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:38:11,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:38:11,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:38:11,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:38:11,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:38:11,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:38:11,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:38:11,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:38:11,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:38:11,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:38:11,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:38:11,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:38:11,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:38:11,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:38:11,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:38:11,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:38:11,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:38:11,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:38:11,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:38:11,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:38:11,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:38:11,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:38:11,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:38:11,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:38:11,304 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:38:11,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:38:11,305 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:38:11,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:38:11,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:38:11,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:38:11,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:38:11,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:38:11,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:38:11,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:38:11,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:38:11,306 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:38:11,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:38:11,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:38:11,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:38:11,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:38:11,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:38:11,547 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:38:11,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound50.c [2021-05-06 08:38:11,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30555e1ce/80d12856d868421f96cc17b0f0ae0499/FLAGee8337e7b [2021-05-06 08:38:11,934 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:38:11,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound50.c [2021-05-06 08:38:11,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30555e1ce/80d12856d868421f96cc17b0f0ae0499/FLAGee8337e7b [2021-05-06 08:38:12,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30555e1ce/80d12856d868421f96cc17b0f0ae0499 [2021-05-06 08:38:12,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:38:12,360 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:38:12,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:38:12,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:38:12,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:38:12,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:38:12" (1/1) ... [2021-05-06 08:38:12,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a19d8ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12, skipping insertion in model container [2021-05-06 08:38:12,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:38:12" (1/1) ... [2021-05-06 08:38:12,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:38:12,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:38:12,470 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_valuebound50.c[525,538] [2021-05-06 08:38:12,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:38:12,484 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:38:12,491 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_valuebound50.c[525,538] [2021-05-06 08:38:12,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:38:12,501 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:38:12,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12 WrapperNode [2021-05-06 08:38:12,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:38:12,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:38:12,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:38:12,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:38:12,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12" (1/1) ... [2021-05-06 08:38:12,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12" (1/1) ... [2021-05-06 08:38:12,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12" (1/1) ... [2021-05-06 08:38:12,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12" (1/1) ... [2021-05-06 08:38:12,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12" (1/1) ... [2021-05-06 08:38:12,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12" (1/1) ... [2021-05-06 08:38:12,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12" (1/1) ... [2021-05-06 08:38:12,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:38:12,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:38:12,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:38:12,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:38:12,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12" (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 08:38:12,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:38:12,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:38:12,595 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:38:12,595 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:38:12,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:38:12,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:38:12,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:38:12,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:38:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:38:12,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:38:12,791 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:38:12,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:38:12 BoogieIcfgContainer [2021-05-06 08:38:12,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:38:12,792 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:38:12,792 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:38:12,793 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:38:12,794 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:38:12" (1/1) ... [2021-05-06 08:38:12,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:38:12 BasicIcfg [2021-05-06 08:38:12,804 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:38:12,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:38:12,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:38:12,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:38:12,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:38:12" (1/4) ... [2021-05-06 08:38:12,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41613ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:38:12, skipping insertion in model container [2021-05-06 08:38:12,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:12" (2/4) ... [2021-05-06 08:38:12,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41613ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:38:12, skipping insertion in model container [2021-05-06 08:38:12,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:38:12" (3/4) ... [2021-05-06 08:38:12,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41613ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:38:12, skipping insertion in model container [2021-05-06 08:38:12,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:38:12" (4/4) ... [2021-05-06 08:38:12,808 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound50.cJordan [2021-05-06 08:38:12,812 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:38:12,814 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:38:12,824 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:38:12,835 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:38:12,836 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:38:12,836 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:38:12,836 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:38:12,836 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:38:12,836 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:38:12,836 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:38:12,836 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:38:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:38:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:38:12,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:12,848 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:12,848 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:12,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1141493127, now seen corresponding path program 1 times [2021-05-06 08:38:12,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:12,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163541964] [2021-05-06 08:38:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:12,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:38:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:12,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:38:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:12,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:38:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:38:13,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:13,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163541964] [2021-05-06 08:38:13,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163541964] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:38:13,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:38:13,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:38:13,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462462394] [2021-05-06 08:38:13,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:38:13,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:38:13,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:38:13,020 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:38:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:13,069 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-05-06 08:38:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:38:13,070 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:38:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:13,075 INFO L225 Difference]: With dead ends: 29 [2021-05-06 08:38:13,075 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 08:38:13,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:38:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 08:38:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 08:38:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:38:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-06 08:38:13,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2021-05-06 08:38:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:13,106 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-06 08:38:13,106 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:38:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-06 08:38:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:38:13,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:13,107 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:13,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:38:13,108 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:13,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1441395781, now seen corresponding path program 1 times [2021-05-06 08:38:13,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:13,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114337573] [2021-05-06 08:38:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:13,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:13,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132048018] [2021-05-06 08:38:13,153 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 08:38:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:13,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:38:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:13,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:38:13,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:13,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114337573] [2021-05-06 08:38:13,317 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:13,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132048018] [2021-05-06 08:38:13,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132048018] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:38:13,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:38:13,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:38:13,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16563739] [2021-05-06 08:38:13,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:38:13,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:38:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:38:13,319 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:38:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:13,342 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-06 08:38:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:38:13,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:38:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:13,344 INFO L225 Difference]: With dead ends: 32 [2021-05-06 08:38:13,344 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 08:38:13,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:38:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 08:38:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 08:38:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:38:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-06 08:38:13,348 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-06 08:38:13,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:13,349 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-06 08:38:13,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:38:13,349 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-06 08:38:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 08:38:13,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:13,349 INFO L523 BasicCegarLoop]: trace histogram [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 08:38:13,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:38:13,569 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2044378429, now seen corresponding path program 1 times [2021-05-06 08:38:13,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:13,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082014643] [2021-05-06 08:38:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:13,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:13,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72918877] [2021-05-06 08:38:13,580 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 08:38:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:13,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:38:13,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:13,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:13,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:13,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:38:13,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:13,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082014643] [2021-05-06 08:38:13,704 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:13,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72918877] [2021-05-06 08:38:13,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72918877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:38:13,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:38:13,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:38:13,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534381203] [2021-05-06 08:38:13,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:38:13,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:13,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:38:13,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:38:13,706 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:38:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:13,735 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-06 08:38:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:38:13,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 08:38:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:13,736 INFO L225 Difference]: With dead ends: 39 [2021-05-06 08:38:13,736 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:38:13,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:38:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:38:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:38:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:38:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-06 08:38:13,739 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2021-05-06 08:38:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:13,740 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-06 08:38:13,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:38:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-06 08:38:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:38:13,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:13,741 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:13,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:13,944 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:13,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1793299131, now seen corresponding path program 2 times [2021-05-06 08:38:13,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:13,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761453983] [2021-05-06 08:38:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:13,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:13,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75128192] [2021-05-06 08:38:13,966 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 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 08:38:14,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:38:14,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:38:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:38:14,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:14,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:14,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:14,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:14,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:14,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:14,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:14,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:14,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:14,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:14,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:38:14,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:14,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761453983] [2021-05-06 08:38:14,365 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:14,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75128192] [2021-05-06 08:38:14,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75128192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:38:14,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:38:14,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:38:14,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907015056] [2021-05-06 08:38:14,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:38:14,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:14,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:38:14,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:38:14,367 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:38:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:32,332 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-05-06 08:38:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:38:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 08:38:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:32,333 INFO L225 Difference]: With dead ends: 46 [2021-05-06 08:38:32,333 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:38:32,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:38:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:38:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 08:38:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:38:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-06 08:38:32,336 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2021-05-06 08:38:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:32,337 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-06 08:38:32,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:38:32,337 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-06 08:38:32,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:38:32,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:32,338 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:32,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:32,550 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:32,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:32,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1935793091, now seen corresponding path program 3 times [2021-05-06 08:38:32,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:32,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384289702] [2021-05-06 08:38:32,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:32,559 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:32,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306358046] [2021-05-06 08:38:32,559 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 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 08:38:32,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:38:32,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:38:32,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:38:32,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:32,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 08:38:32,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:32,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384289702] [2021-05-06 08:38:32,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:32,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306358046] [2021-05-06 08:38:32,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306358046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:38:32,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:38:32,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:38:32,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342545761] [2021-05-06 08:38:32,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:38:32,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:32,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:38:32,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:38:32,975 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5)