/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:04:20,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:04:20,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:04:20,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:04:20,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:04:20,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:04:20,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:04:20,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:04:20,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:04:20,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:04:20,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:04:20,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:04:20,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:04:20,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:04:20,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:04:20,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:04:20,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:04:20,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:04:20,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:04:20,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:04:20,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:04:20,438 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:04:20,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:04:20,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:04:20,440 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:04:20,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:04:20,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:04:20,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:04:20,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:04:20,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:04:20,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:04:20,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:04:20,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:04:20,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:04:20,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:04:20,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:04:20,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:04:20,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:04:20,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:04:20,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:04:20,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:04:20,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:04:20,444 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:04:20,444 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:04:20,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:04:20,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:04:20,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:04:20,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:04:20,706 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:04:20,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2021-05-06 09:04:20,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78c1ccbf/a2211d6309aa4ccea4ec05e03959278a/FLAGf9e5b14d7 [2021-05-06 09:04:21,099 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:04:21,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2021-05-06 09:04:21,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78c1ccbf/a2211d6309aa4ccea4ec05e03959278a/FLAGf9e5b14d7 [2021-05-06 09:04:21,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78c1ccbf/a2211d6309aa4ccea4ec05e03959278a [2021-05-06 09:04:21,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:04:21,124 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:04:21,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:04:21,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:04:21,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:04:21,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:04:21" (1/1) ... [2021-05-06 09:04:21,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c03f9b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21, skipping insertion in model container [2021-05-06 09:04:21,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:04:21" (1/1) ... [2021-05-06 09:04:21,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:04:21,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:04:21,234 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c[545,558] [2021-05-06 09:04:21,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:04:21,272 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:04:21,279 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c[545,558] [2021-05-06 09:04:21,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:04:21,292 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:04:21,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21 WrapperNode [2021-05-06 09:04:21,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:04:21,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:04:21,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:04:21,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:04:21,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21" (1/1) ... [2021-05-06 09:04:21,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21" (1/1) ... [2021-05-06 09:04:21,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21" (1/1) ... [2021-05-06 09:04:21,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21" (1/1) ... [2021-05-06 09:04:21,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21" (1/1) ... [2021-05-06 09:04:21,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21" (1/1) ... [2021-05-06 09:04:21,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21" (1/1) ... [2021-05-06 09:04:21,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:04:21,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:04:21,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:04:21,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:04:21,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:04:21,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:04:21,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:04:21,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:04:21,389 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:04:21,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:04:21,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:04:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:04:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:04:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:04:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:04:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 09:04:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:04:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:04:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:04:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:04:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:04:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:04:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:04:21,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:04:21,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:04:21,652 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:04:21,652 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:04:21,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:04:21 BoogieIcfgContainer [2021-05-06 09:04:21,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:04:21,654 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:04:21,654 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:04:21,654 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:04:21,656 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:04:21" (1/1) ... [2021-05-06 09:04:21,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:04:21 BasicIcfg [2021-05-06 09:04:21,666 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:04:21,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:04:21,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:04:21,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:04:21,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:04:21" (1/4) ... [2021-05-06 09:04:21,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1c2b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:04:21, skipping insertion in model container [2021-05-06 09:04:21,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:04:21" (2/4) ... [2021-05-06 09:04:21,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1c2b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:04:21, skipping insertion in model container [2021-05-06 09:04:21,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:04:21" (3/4) ... [2021-05-06 09:04:21,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1c2b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:04:21, skipping insertion in model container [2021-05-06 09:04:21,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:04:21" (4/4) ... [2021-05-06 09:04:21,671 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.cJordan [2021-05-06 09:04:21,674 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:04:21,676 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:04:21,686 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:04:21,699 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:04:21,699 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:04:21,699 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:04:21,699 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:04:21,699 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:04:21,700 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:04:21,700 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:04:21,700 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:04:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:04:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:04:21,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:04:21,713 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:04:21,713 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:04:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:04:21,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 09:04:21,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:04:21,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801031051] [2021-05-06 09:04:21,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:04:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:21,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:04:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:21,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:04:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:21,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:04:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:21,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:04:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:04:21,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:04:21,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801031051] [2021-05-06 09:04:21,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801031051] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:04:21,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:04:21,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:04:21,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115752646] [2021-05-06 09:04:21,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:04:21,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:04:21,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:04:21,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:04:21,875 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:04:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:04:22,023 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 09:04:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:04:22,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 09:04:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:04:22,030 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:04:22,030 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 09:04:22,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:04:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 09:04:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 09:04:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:04:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 09:04:22,060 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 09:04:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:04:22,061 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 09:04:22,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:04:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 09:04:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:04:22,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:04:22,063 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:04:22,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:04:22,063 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:04:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:04:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 09:04:22,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:04:22,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078932845] [2021-05-06 09:04:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:04:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:04:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:04:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:04:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:04:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:04:22,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:04:22,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078932845] [2021-05-06 09:04:22,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078932845] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:04:22,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:04:22,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:04:22,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483757993] [2021-05-06 09:04:22,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:04:22,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:04:22,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:04:22,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:04:22,218 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:04:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:04:22,543 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 09:04:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:04:22,544 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 09:04:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:04:22,546 INFO L225 Difference]: With dead ends: 44 [2021-05-06 09:04:22,546 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 09:04:22,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:04:22,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 09:04:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 09:04:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:04:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 09:04:22,553 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 09:04:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:04:22,553 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 09:04:22,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:04:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 09:04:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:04:22,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:04:22,554 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:04:22,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:04:22,554 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:04:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:04:22,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 09:04:22,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:04:22,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3957370] [2021-05-06 09:04:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:04:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:04:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:04:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:04:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:04:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 09:04:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:04:22,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:04:22,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3957370] [2021-05-06 09:04:22,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3957370] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:04:22,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:04:22,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:04:22,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904330918] [2021-05-06 09:04:22,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:04:22,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:04:22,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:04:22,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:04:22,730 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:04:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:04:22,989 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:04:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:04:22,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 09:04:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:04:22,992 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:04:22,992 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:04:22,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:04:22,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:04:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 09:04:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:04:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 09:04:23,008 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 09:04:23,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:04:23,009 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 09:04:23,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:04:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 09:04:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 09:04:23,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:04:23,010 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:04:23,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:04:23,010 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:04:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:04:23,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 09:04:23,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:04:23,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490808591] [2021-05-06 09:04:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:04:23,018 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:04:23,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785993518] [2021-05-06 09:04:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:04:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:04:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:04:23,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 09:04:23,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:04:23,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490808591] [2021-05-06 09:04:23,248 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:04:23,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785993518] [2021-05-06 09:04:23,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785993518] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:04:23,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:04:23,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:04:23,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188566856] [2021-05-06 09:04:23,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:04:23,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:04:23,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:04:23,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:04:23,250 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 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 09:04:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:04:25,463 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-06 09:04:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:04:25,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 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 38 [2021-05-06 09:04:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:04:25,464 INFO L225 Difference]: With dead ends: 56 [2021-05-06 09:04:25,464 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 09:04:25,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:04:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 09:04:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 09:04:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 09:04:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 09:04:25,468 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 09:04:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:04:25,468 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 09:04:25,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 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 09:04:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 09:04:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 09:04:25,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:04:25,469 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:04:25,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:04:25,677 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:04:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:04:25,677 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 09:04:25,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:04:25,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318558783] [2021-05-06 09:04:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:04:25,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:04:25,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931336911] [2021-05-06 09:04:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:04:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:25,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 09:04:25,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:04:25,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 09:04:25,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:04:25,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318558783] [2021-05-06 09:04:25,896 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:04:25,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931336911] [2021-05-06 09:04:25,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931336911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:04:25,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:04:25,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:04:25,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341339593] [2021-05-06 09:04:25,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:04:25,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:04:25,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:04:25,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:04:25,898 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:04:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:04:26,122 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-05-06 09:04:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:04:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 09:04:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:04:26,123 INFO L225 Difference]: With dead ends: 74 [2021-05-06 09:04:26,124 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 09:04:26,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:04:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 09:04:26,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 09:04:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 09:04:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 09:04:26,130 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 09:04:26,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:04:26,130 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 09:04:26,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:04:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 09:04:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 09:04:26,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:04:26,131 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:04:26,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:04:26,332 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:04:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:04:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 09:04:26,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:04:26,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185411684] [2021-05-06 09:04:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:04:26,339 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:04:26,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441380494] [2021-05-06 09:04:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:04:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:04:26,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 09:04:26,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:04:26,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:04:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 09:04:26,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:04:26,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185411684] [2021-05-06 09:04:26,732 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:04:26,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441380494] [2021-05-06 09:04:26,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441380494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:04:26,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:04:26,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:04:26,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280160247] [2021-05-06 09:04:26,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:04:26,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:04:26,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:04:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:04:26,733 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:04:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:04:32,068 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 09:04:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:04:32,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 09:04:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:04:32,070 INFO L225 Difference]: With dead ends: 91 [2021-05-06 09:04:32,070 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 09:04:32,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:04:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 09:04:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 09:04:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 09:04:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 09:04:32,075 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 09:04:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:04:32,076 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 09:04:32,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:04:32,076 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 09:04:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 09:04:32,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:04:32,077 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:04:32,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:04:32,282 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:04:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:04:32,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2021-05-06 09:04:32,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:04:32,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959575004] [2021-05-06 09:04:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:04:32,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:04:32,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265571812] [2021-05-06 09:04:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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