/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/divbin_valuebound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:58:03,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:58:03,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:58:03,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:58:03,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:58:03,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:58:03,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:58:03,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:58:03,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:58:03,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:58:03,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:58:03,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:58:03,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:58:03,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:58:03,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:58:03,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:58:03,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:58:03,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:58:03,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:58:03,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:58:03,734 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:58:03,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:58:03,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:58:03,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:58:03,753 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:58:03,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:58:03,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:58:03,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:58:03,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:58:03,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:58:03,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:58:03,755 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:58:03,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:58:03,755 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:58:03,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:58:03,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:58:03,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:58:03,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:58:03,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:58:03,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:58:03,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:58:03,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:58:03,758 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:58:03,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:58:04,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:58:04,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:58:04,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:58:04,092 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:58:04,092 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:58:04,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound2.i [2021-05-06 07:58:04,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d875716df/f6ec9f0675f24e3cb010e9e764867477/FLAGdeb082c8a [2021-05-06 07:58:04,544 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:58:04,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound2.i [2021-05-06 07:58:04,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d875716df/f6ec9f0675f24e3cb010e9e764867477/FLAGdeb082c8a [2021-05-06 07:58:04,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d875716df/f6ec9f0675f24e3cb010e9e764867477 [2021-05-06 07:58:04,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:58:04,962 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:58:04,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:58:04,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:58:04,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:58:04,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:58:04" (1/1) ... [2021-05-06 07:58:04,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a60411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:04, skipping insertion in model container [2021-05-06 07:58:04,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:58:04" (1/1) ... [2021-05-06 07:58:04,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:58:04,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:58:05,114 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/divbin_valuebound2.i[958,971] [2021-05-06 07:58:05,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:58:05,137 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:58:05,170 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/divbin_valuebound2.i[958,971] [2021-05-06 07:58:05,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:58:05,213 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:58:05,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:05 WrapperNode [2021-05-06 07:58:05,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:58:05,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:58:05,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:58:05,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:58:05,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:05" (1/1) ... [2021-05-06 07:58:05,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:05" (1/1) ... [2021-05-06 07:58:05,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:05" (1/1) ... [2021-05-06 07:58:05,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:05" (1/1) ... [2021-05-06 07:58:05,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:05" (1/1) ... [2021-05-06 07:58:05,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:05" (1/1) ... [2021-05-06 07:58:05,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:05" (1/1) ... [2021-05-06 07:58:05,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:58:05,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:58:05,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:58:05,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:58:05,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:05" (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 07:58:05,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:58:05,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:58:05,352 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:58:05,352 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:58:05,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:58:05,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:58:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:58:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:58:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:58:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:58:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:58:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:58:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:58:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:58:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:58:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:58:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:58:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:58:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:58:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:58:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:58:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:58:05,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:58:05,653 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:58:05,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:58:05 BoogieIcfgContainer [2021-05-06 07:58:05,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:58:05,655 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:58:05,655 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:58:05,656 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:58:05,658 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:58:05" (1/1) ... [2021-05-06 07:58:05,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:58:05 BasicIcfg [2021-05-06 07:58:05,688 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:58:05,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:58:05,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:58:05,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:58:05,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:58:04" (1/4) ... [2021-05-06 07:58:05,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bc2ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:58:05, skipping insertion in model container [2021-05-06 07:58:05,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:05" (2/4) ... [2021-05-06 07:58:05,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bc2ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:58:05, skipping insertion in model container [2021-05-06 07:58:05,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:58:05" (3/4) ... [2021-05-06 07:58:05,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bc2ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:58:05, skipping insertion in model container [2021-05-06 07:58:05,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:58:05" (4/4) ... [2021-05-06 07:58:05,711 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.iJordan [2021-05-06 07:58:05,716 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:58:05,720 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:58:05,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:58:05,763 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:58:05,763 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:58:05,763 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:58:05,763 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:58:05,763 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:58:05,764 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:58:05,764 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:58:05,764 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:58:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:58:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 07:58:05,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:58:05,793 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 07:58:05,794 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:58:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:58:05,799 INFO L82 PathProgramCache]: Analyzing trace with hash -402483300, now seen corresponding path program 1 times [2021-05-06 07:58:05,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:58:05,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386920459] [2021-05-06 07:58:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:58:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:06,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:58:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:06,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:58:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:06,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:58:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 07:58:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:06,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 07:58:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:58:06,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:58:06,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386920459] [2021-05-06 07:58:06,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386920459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:58:06,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:58:06,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:58:06,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755274605] [2021-05-06 07:58:06,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:58:06,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:58:06,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:58:06,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:58:06,078 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:58:06,175 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:58:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:58:06,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 07:58:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:58:06,183 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:58:06,184 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:58:06,185 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:58:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:58:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 07:58:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:58:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 07:58:06,215 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-06 07:58:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:58:06,216 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 07:58:06,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 07:58:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 07:58:06,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:58:06,218 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 07:58:06,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:58:06,218 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:58:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:58:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1131459816, now seen corresponding path program 1 times [2021-05-06 07:58:06,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:58:06,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904143072] [2021-05-06 07:58:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:58:06,241 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:58:06,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105130597] [2021-05-06 07:58:06,242 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 07:58:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:06,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:58:06,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:58:06,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 07:58:06,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:58:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904143072] [2021-05-06 07:58:06,697 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:58:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105130597] [2021-05-06 07:58:06,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105130597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:58:06,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:58:06,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:58:06,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317183962] [2021-05-06 07:58:06,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:58:06,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:58:06,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:58:06,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:58:06,700 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:58:07,036 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 07:58:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:58:07,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-05-06 07:58:07,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:58:07,038 INFO L225 Difference]: With dead ends: 42 [2021-05-06 07:58:07,039 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 07:58:07,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:58:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 07:58:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-06 07:58:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:58:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-06 07:58:07,046 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-06 07:58:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:58:07,047 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-06 07:58:07,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-06 07:58:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 07:58:07,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:58:07,048 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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 07:58:07,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:58:07,275 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:58:07,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:58:07,275 INFO L82 PathProgramCache]: Analyzing trace with hash -305154333, now seen corresponding path program 1 times [2021-05-06 07:58:07,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:58:07,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887346455] [2021-05-06 07:58:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:58:07,294 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:58:07,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626205478] [2021-05-06 07:58:07,295 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 07:58:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:07,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 07:58:07,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:58:07,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:58:07,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:58:07,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887346455] [2021-05-06 07:58:07,625 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:58:07,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626205478] [2021-05-06 07:58:07,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626205478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:58:07,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:58:07,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:58:07,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876220818] [2021-05-06 07:58:07,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:58:07,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:58:07,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:58:07,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:58:07,628 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:07,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:58:07,914 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-06 07:58:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:58:07,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 07:58:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:58:07,916 INFO L225 Difference]: With dead ends: 55 [2021-05-06 07:58:07,916 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:58:07,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-06 07:58:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:58:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-06 07:58:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:58:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-06 07:58:07,923 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 37 [2021-05-06 07:58:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:58:07,923 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-06 07:58:07,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-06 07:58:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 07:58:07,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:58:07,924 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:58:08,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:58:08,141 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:58:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:58:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1858557484, now seen corresponding path program 1 times [2021-05-06 07:58:08,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:58:08,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461601707] [2021-05-06 07:58:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:58:08,165 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:58:08,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149697526] [2021-05-06 07:58:08,166 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 07:58:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:08,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 07:58:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:58:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:58:08,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:58:08,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461601707] [2021-05-06 07:58:08,328 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:58:08,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149697526] [2021-05-06 07:58:08,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149697526] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:58:08,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:58:08,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:58:08,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034045076] [2021-05-06 07:58:08,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:58:08,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:58:08,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:58:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:58:08,330 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 07:58:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:58:08,345 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-05-06 07:58:08,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:58:08,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-06 07:58:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:58:08,347 INFO L225 Difference]: With dead ends: 42 [2021-05-06 07:58:08,347 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 07:58:08,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:58:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 07:58:08,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 07:58:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:58:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-06 07:58:08,352 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 43 [2021-05-06 07:58:08,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:58:08,353 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-06 07:58:08,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 07:58:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-06 07:58:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 07:58:08,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:58:08,354 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:58:08,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:58:08,571 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:58:08,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:58:08,572 INFO L82 PathProgramCache]: Analyzing trace with hash 270500047, now seen corresponding path program 1 times [2021-05-06 07:58:08,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:58:08,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467668057] [2021-05-06 07:58:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:58:08,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:58:08,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639588944] [2021-05-06 07:58:08,591 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