/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:07:46,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:07:46,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:07:46,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:07:46,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:07:46,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:07:46,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:07:46,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:07:46,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:07:46,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:07:46,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:07:46,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:07:46,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:07:46,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:07:46,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:07:46,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:07:46,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:07:46,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:07:46,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:07:46,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:07:46,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:07:46,280 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:07:46,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:07:46,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:07:46,282 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:07:46,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:07:46,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:07:46,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:07:46,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:07:46,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:07:46,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:07:46,282 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:07:46,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:07:46,283 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:07:46,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:07:46,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:07:46,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:07:46,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:07:46,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:07:46,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:07:46,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:07:46,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:07:46,284 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:07:46,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:07:46,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:07:46,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:07:46,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:07:46,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:07:46,530 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:07:46,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c [2021-05-06 09:07:46,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8681e6527/22e7ae8371b54e179ebb23f1f43b5254/FLAGf87cb4d55 [2021-05-06 09:07:46,881 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:07:46,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c [2021-05-06 09:07:46,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8681e6527/22e7ae8371b54e179ebb23f1f43b5254/FLAGf87cb4d55 [2021-05-06 09:07:47,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8681e6527/22e7ae8371b54e179ebb23f1f43b5254 [2021-05-06 09:07:47,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:07:47,322 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:07:47,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:07:47,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:07:47,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:07:47,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:07:47" (1/1) ... [2021-05-06 09:07:47,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29f06f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47, skipping insertion in model container [2021-05-06 09:07:47,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:07:47" (1/1) ... [2021-05-06 09:07:47,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:07:47,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:07:47,428 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_valuebound2.c[545,558] [2021-05-06 09:07:47,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:07:47,445 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:07:47,453 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_valuebound2.c[545,558] [2021-05-06 09:07:47,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:07:47,497 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:07:47,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47 WrapperNode [2021-05-06 09:07:47,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:07:47,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:07:47,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:07:47,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:07:47,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47" (1/1) ... [2021-05-06 09:07:47,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47" (1/1) ... [2021-05-06 09:07:47,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47" (1/1) ... [2021-05-06 09:07:47,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47" (1/1) ... [2021-05-06 09:07:47,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47" (1/1) ... [2021-05-06 09:07:47,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47" (1/1) ... [2021-05-06 09:07:47,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47" (1/1) ... [2021-05-06 09:07:47,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:07:47,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:07:47,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:07:47,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:07:47,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47" (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 09:07:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:07:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:07:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:07:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:07:47,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:07:47,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:07:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:07:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:07:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:07:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:07:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 09:07:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:07:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:07:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:07:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:07:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:07:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:07:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:07:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:07:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:07:47,844 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:07:47,844 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:07:47,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:07:47 BoogieIcfgContainer [2021-05-06 09:07:47,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:07:47,846 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:07:47,846 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:07:47,847 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:07:47,858 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:07:47" (1/1) ... [2021-05-06 09:07:47,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:07:47 BasicIcfg [2021-05-06 09:07:47,870 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:07:47,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:07:47,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:07:47,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:07:47,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:07:47" (1/4) ... [2021-05-06 09:07:47,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef8917c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:07:47, skipping insertion in model container [2021-05-06 09:07:47,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:47" (2/4) ... [2021-05-06 09:07:47,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef8917c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:07:47, skipping insertion in model container [2021-05-06 09:07:47,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:07:47" (3/4) ... [2021-05-06 09:07:47,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef8917c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:07:47, skipping insertion in model container [2021-05-06 09:07:47,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:07:47" (4/4) ... [2021-05-06 09:07:47,886 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.cJordan [2021-05-06 09:07:47,892 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:07:47,896 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:07:47,907 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:07:47,928 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:07:47,928 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:07:47,929 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:07:47,929 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:07:47,929 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:07:47,929 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:07:47,929 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:07:47,929 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:07:47,944 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 09:07:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:07:47,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:47,951 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 09:07:47,952 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:47,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:47,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 09:07:47,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:47,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276377078] [2021-05-06 09:07:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:07:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:07:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:07:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:07:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,191 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 09:07:48,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:48,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276377078] [2021-05-06 09:07:48,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276377078] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:07:48,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:07:48,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:07:48,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960655373] [2021-05-06 09:07:48,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:07:48,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:48,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:07:48,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:07:48,206 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 09:07:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:48,309 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 09:07:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:07:48,311 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 09:07:48,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:48,315 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:07:48,316 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 09:07:48,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:07:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 09:07:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 09:07:48,339 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 09:07:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 09:07:48,340 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 09:07:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:48,341 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 09:07:48,341 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 09:07:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 09:07:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:07:48,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:48,342 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 09:07:48,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:07:48,343 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 09:07:48,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:48,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72696478] [2021-05-06 09:07:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:07:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:07:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:07:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:07:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,456 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 09:07:48,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:48,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72696478] [2021-05-06 09:07:48,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72696478] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:07:48,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:07:48,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:07:48,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872413481] [2021-05-06 09:07:48,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:07:48,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:48,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:07:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:07:48,459 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 09:07:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:48,684 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 09:07:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:07:48,684 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 09:07:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:48,685 INFO L225 Difference]: With dead ends: 44 [2021-05-06 09:07:48,685 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 09:07:48,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:07:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 09:07:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 09:07:48,693 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 09:07:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 09:07:48,694 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 09:07:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:48,694 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 09:07:48,694 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 09:07:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 09:07:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:07:48,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:48,695 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 09:07:48,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:07:48,695 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:48,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 09:07:48,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:48,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400843976] [2021-05-06 09:07:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:07:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:07:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:07:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:07:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 09:07:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:48,868 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 09:07:48,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:48,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400843976] [2021-05-06 09:07:48,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400843976] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:07:48,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:07:48,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:07:48,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292672662] [2021-05-06 09:07:48,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:07:48,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:48,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:07:48,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:07:48,870 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 09:07:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:49,173 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:07:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:07:49,174 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 09:07:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:49,176 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:07:49,176 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:07:49,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:07:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:07:49,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 09:07:49,186 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 09:07:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 09:07:49,189 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 09:07:49,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:49,189 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 09:07:49,190 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 09:07:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 09:07:49,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 09:07:49,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:49,191 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 09:07:49,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:07:49,192 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:49,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 09:07:49,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:49,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754625478] [2021-05-06 09:07:49,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:49,222 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:07:49,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405806724] [2021-05-06 09:07:49,222 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 09:07:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:49,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:07:49,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:07:49,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:49,447 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 09:07:49,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:49,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754625478] [2021-05-06 09:07:49,447 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:07:49,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405806724] [2021-05-06 09:07:49,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405806724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:07:49,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:07:49,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:07:49,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528626979] [2021-05-06 09:07:49,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:07:49,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:49,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:07:49,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:07:49,449 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 09:07:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:51,675 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-06 09:07:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:07:51,675 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 09:07:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:51,676 INFO L225 Difference]: With dead ends: 56 [2021-05-06 09:07:51,676 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 09:07:51,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:07:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 09:07:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 09:07:51,680 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 09:07:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 09:07:51,680 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 09:07:51,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:51,681 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 09:07:51,681 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 09:07:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 09:07:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 09:07:51,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:51,682 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 09:07:51,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:07:51,895 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:51,896 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 09:07:51,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:51,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741626900] [2021-05-06 09:07:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:51,908 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:07:51,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904436963] [2021-05-06 09:07:51,909 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 09:07:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 09:07:51,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:07:52,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,231 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 09:07:52,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:52,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741626900] [2021-05-06 09:07:52,236 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:07:52,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904436963] [2021-05-06 09:07:52,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904436963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:07:52,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:07:52,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:07:52,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172370182] [2021-05-06 09:07:52,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:07:52,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:52,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:07:52,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:07:52,238 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 09:07:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:52,519 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-05-06 09:07:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:07:52,520 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 09:07:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:52,521 INFO L225 Difference]: With dead ends: 74 [2021-05-06 09:07:52,521 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 09:07:52,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:07:52,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 09:07:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 09:07:52,525 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 09:07:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 09:07:52,526 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 09:07:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:52,526 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 09:07:52,526 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 09:07:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 09:07:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 09:07:52,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:52,528 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 09:07:52,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:07:52,733 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 09:07:52,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:52,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428664167] [2021-05-06 09:07:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:52,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:07:52,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351012361] [2021-05-06 09:07:52,751 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 09:07:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:52,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 09:07:52,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:07:52,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:52,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:53,186 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 09:07:53,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:53,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428664167] [2021-05-06 09:07:53,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:07:53,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351012361] [2021-05-06 09:07:53,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351012361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:07:53,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:07:53,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:07:53,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595008827] [2021-05-06 09:07:53,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:07:53,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:53,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:07:53,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:07:53,188 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 09:07:57,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:57,833 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 09:07:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:07:57,833 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 09:07:57,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:57,835 INFO L225 Difference]: With dead ends: 91 [2021-05-06 09:07:57,836 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 09:07:57,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:07:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 09:07:57,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 09:07:57,840 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 09:07:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 09:07:57,841 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 09:07:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:57,841 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 09:07:57,841 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 09:07:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 09:07:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 09:07:57,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:57,842 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 09:07:58,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:07:58,048 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:58,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2021-05-06 09:07:58,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:58,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698313779] [2021-05-06 09:07:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:58,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:07:58,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952153507] [2021-05-06 09:07:58,055 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