/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/prodbin-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:00:00,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:00:00,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:00:00,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:00:00,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:00:00,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:00:00,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:00:00,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:00:00,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:00:00,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:00:00,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:00:00,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:00:00,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:00:00,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:00:00,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:00:00,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:00:00,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:00:00,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:00:00,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:00:00,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:00:00,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:00:00,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:00:00,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:00:00,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:00:00,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:00:00,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:00:00,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:00:00,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:00:00,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:00:00,358 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:00:00,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:00:00,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:00:00,361 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:00:00,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:00:00,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:00:00,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:00:00,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:00:00,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:00:00,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:00:00,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:00:00,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:00:00,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:00:00,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:00:00,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:00:00,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:00:00,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:00:00,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:00:00,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:00:00,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:00:00,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:00:00,364 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:00:00,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:00:00,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:00:00,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:00:00,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:00:00,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:00:00,625 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:00:00,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-05-06 10:00:00,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9350a1e2a/565310801e0145feb939207d607c3da4/FLAGa7c5270d3 [2021-05-06 10:00:01,001 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:00:01,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-05-06 10:00:01,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9350a1e2a/565310801e0145feb939207d607c3da4/FLAGa7c5270d3 [2021-05-06 10:00:01,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9350a1e2a/565310801e0145feb939207d607c3da4 [2021-05-06 10:00:01,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:00:01,440 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:00:01,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:00:01,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:00:01,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:00:01,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:00:01" (1/1) ... [2021-05-06 10:00:01,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a8bd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01, skipping insertion in model container [2021-05-06 10:00:01,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:00:01" (1/1) ... [2021-05-06 10:00:01,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:00:01,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:00:01,576 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/prodbin-ll_unwindbound1.c[537,550] [2021-05-06 10:00:01,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:00:01,598 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:00:01,607 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/prodbin-ll_unwindbound1.c[537,550] [2021-05-06 10:00:01,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:00:01,629 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:00:01,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01 WrapperNode [2021-05-06 10:00:01,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:00:01,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:00:01,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:00:01,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:00:01,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01" (1/1) ... [2021-05-06 10:00:01,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01" (1/1) ... [2021-05-06 10:00:01,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01" (1/1) ... [2021-05-06 10:00:01,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01" (1/1) ... [2021-05-06 10:00:01,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01" (1/1) ... [2021-05-06 10:00:01,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01" (1/1) ... [2021-05-06 10:00:01,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01" (1/1) ... [2021-05-06 10:00:01,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:00:01,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:00:01,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:00:01,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:00:01,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01" (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 10:00:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:00:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:00:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:00:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:00:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:00:01,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:00:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:00:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:00:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:00:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:00:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:00:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:00:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:00:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:00:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:00:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:00:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:00:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:00:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:00:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:00:02,024 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:00:02,024 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:00:02,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:00:02 BoogieIcfgContainer [2021-05-06 10:00:02,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:00:02,026 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:00:02,026 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:00:02,026 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:00:02,028 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:00:02" (1/1) ... [2021-05-06 10:00:02,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:00:02 BasicIcfg [2021-05-06 10:00:02,052 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:00:02,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:00:02,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:00:02,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:00:02,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:00:01" (1/4) ... [2021-05-06 10:00:02,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcbd508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:00:02, skipping insertion in model container [2021-05-06 10:00:02,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:01" (2/4) ... [2021-05-06 10:00:02,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcbd508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:00:02, skipping insertion in model container [2021-05-06 10:00:02,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:00:02" (3/4) ... [2021-05-06 10:00:02,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcbd508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:00:02, skipping insertion in model container [2021-05-06 10:00:02,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:00:02" (4/4) ... [2021-05-06 10:00:02,057 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.cJordan [2021-05-06 10:00:02,061 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:00:02,063 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:00:02,076 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:00:02,096 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:00:02,096 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:00:02,096 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:00:02,096 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:00:02,096 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:00:02,096 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:00:02,096 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:00:02,096 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:00:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:00:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:00:02,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:02,114 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:02,115 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:02,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-06 10:00:02,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:02,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768173735] [2021-05-06 10:00:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:02,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:00:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:02,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:00:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:02,338 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 10:00:02,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:02,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768173735] [2021-05-06 10:00:02,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768173735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:00:02,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:00:02,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:00:02,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656377310] [2021-05-06 10:00:02,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:00:02,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:02,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:00:02,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:00:02,369 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:00:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:02,448 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-06 10:00:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:00:02,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:00:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:02,454 INFO L225 Difference]: With dead ends: 31 [2021-05-06 10:00:02,454 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:00:02,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:00:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:00:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 10:00:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 10:00:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 10:00:02,503 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-06 10:00:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:02,503 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 10:00:02,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:00:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 10:00:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:00:02,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:02,504 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:02,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:00:02,504 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:02,504 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-06 10:00:02,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:02,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530077650] [2021-05-06 10:00:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:02,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:02,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685703207] [2021-05-06 10:00:02,544 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 10:00:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:02,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:00:02,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:00:02,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:02,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:02,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:02,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:02,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:02,824 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 10:00:02,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:02,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530077650] [2021-05-06 10:00:02,825 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:00:02,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685703207] [2021-05-06 10:00:02,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685703207] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:00:02,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:00:02,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:00:02,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748593662] [2021-05-06 10:00:02,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:00:02,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:02,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:00:02,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:00:02,827 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:00:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:02,847 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-06 10:00:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:00:02,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 10:00:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:02,848 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:00:02,848 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 10:00:02,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:00:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 10:00:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 10:00:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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 10:00:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 10:00:02,852 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-06 10:00:02,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:02,852 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 10:00:02,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:00:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 10:00:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:00:02,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:02,853 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:03,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:00:03,077 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-06 10:00:03,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:03,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643510828] [2021-05-06 10:00:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:03,087 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:03,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253675584] [2021-05-06 10:00:03,088 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 10:00:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:03,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:00:03,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:00:03,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:03,291 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 10:00:03,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:03,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643510828] [2021-05-06 10:00:03,291 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:00:03,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253675584] [2021-05-06 10:00:03,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253675584] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:00:03,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:00:03,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:00:03,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37216265] [2021-05-06 10:00:03,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:00:03,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:03,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:00:03,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:00:03,293 INFO L87 Difference]: Start difference. First operand 27 states and 30 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:00:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:03,343 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 10:00:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:00:03,344 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:00:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:03,344 INFO L225 Difference]: With dead ends: 36 [2021-05-06 10:00:03,344 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:00:03,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:00:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:00:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-05-06 10:00:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) 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), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:00:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:00:03,348 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:00:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:03,348 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:00:03,349 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:00:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:00:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 10:00:03,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:03,349 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:03,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:03,570 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:03,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2021-05-06 10:00:03,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:03,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094834497] [2021-05-06 10:00:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:03,582 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:03,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262192532] [2021-05-06 10:00:03,582 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 10:00:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:03,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:00:03,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:00:03,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:03,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:03,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:00:03,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:03,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094834497] [2021-05-06 10:00:03,682 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:00:03,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262192532] [2021-05-06 10:00:03,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262192532] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:00:03,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:00:03,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:00:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643783082] [2021-05-06 10:00:03,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:00:03,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:03,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:00:03,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:00:03,685 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:00:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:03,747 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-06 10:00:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:00:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 10:00:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:03,750 INFO L225 Difference]: With dead ends: 35 [2021-05-06 10:00:03,750 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 10:00:03,750 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:00:03,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 10:00:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-06 10:00:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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 10:00:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-06 10:00:03,763 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2021-05-06 10:00:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:03,764 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-06 10:00:03,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:00:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-06 10:00:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:00:03,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:03,766 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:03,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:03,985 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:03,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:03,986 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-06 10:00:03,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:03,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205473429] [2021-05-06 10:00:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:04,002 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:04,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993317577] [2021-05-06 10:00:04,002 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 10:00:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 10:00:04,060 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 10:00:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 10:00:04,079 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 10:00:04,106 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 10:00:04,106 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 10:00:04,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:04,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:00:04 BasicIcfg [2021-05-06 10:00:04,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:00:04,345 INFO L168 Benchmark]: Toolchain (without parser) took 2904.40 ms. Allocated memory was 211.8 MB in the beginning and 307.2 MB in the end (delta: 95.4 MB). Free memory was 177.1 MB in the beginning and 269.2 MB in the end (delta: -92.1 MB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. [2021-05-06 10:00:04,345 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 211.8 MB. Free memory is still 194.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:00:04,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.20 ms. Allocated memory is still 211.8 MB. Free memory was 177.1 MB in the beginning and 166.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 10:00:04,345 INFO L168 Benchmark]: Boogie Preprocessor took 77.17 ms. Allocated memory is still 211.8 MB. Free memory was 166.6 MB in the beginning and 195.4 MB in the end (delta: -28.7 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-06 10:00:04,345 INFO L168 Benchmark]: RCFGBuilder took 315.23 ms. Allocated memory is still 211.8 MB. Free memory was 195.4 MB in the beginning and 180.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:00:04,346 INFO L168 Benchmark]: IcfgTransformer took 26.72 ms. Allocated memory is still 211.8 MB. Free memory was 180.5 MB in the beginning and 179.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:00:04,346 INFO L168 Benchmark]: TraceAbstraction took 2291.12 ms. Allocated memory was 211.8 MB in the beginning and 307.2 MB in the end (delta: 95.4 MB). Free memory was 178.9 MB in the beginning and 269.2 MB in the end (delta: -90.3 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:00:04,346 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 211.8 MB. Free memory is still 194.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 173.20 ms. Allocated memory is still 211.8 MB. Free memory was 177.1 MB in the beginning and 166.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 77.17 ms. Allocated memory is still 211.8 MB. Free memory was 166.6 MB in the beginning and 195.4 MB in the end (delta: -28.7 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 315.23 ms. Allocated memory is still 211.8 MB. Free memory was 195.4 MB in the beginning and 180.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 26.72 ms. Allocated memory is still 211.8 MB. Free memory was 180.5 MB in the beginning and 179.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2291.12 ms. Allocated memory was 211.8 MB in the beginning and 307.2 MB in the end (delta: 95.4 MB). Free memory was 178.9 MB in the beginning and 269.2 MB in the end (delta: -90.3 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [\old(counter)=15, counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) VAL [\old(counter)=0, a=-1, b=3, counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [\old(counter)=0, a=-1, b=3, counter=0, x=-1, y=3, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=-1, b=3, counter=1, counter++=0, x=-1, y=3, z=0] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-1, b=3, counter=1, x=-1, y=3, z=0] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-1, b=3, counter=1, x=-1, y=3, z=0] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-1, b=3, counter=1, x=-1, y=2, z=-1] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-1, b=3, counter=1, x=-2, y=1, z=-1] [L33] EXPR counter++ VAL [\old(counter)=0, a=-1, b=3, counter=2, counter++=1, x=-2, y=1, z=-1] [L33] COND FALSE !(counter++<1) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L15] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2229.5ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 12.3ms, AutomataDifference: 253.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 101 SDtfs, 35 SDslu, 179 SDs, 0 SdLazy, 91 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 143.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 95.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=4, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41.6ms AutomataMinimizationTime, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 49.3ms SsaConstructionTime, 127.6ms SatisfiabilityAnalysisTime, 431.2ms InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 179 SizeOfPredicates, 4 NumberOfNonLiveVariables, 365 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...