/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/prod4br-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:53:10,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:53:10,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:53:10,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:53:10,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:53:10,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:53:10,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:53:10,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:53:10,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:53:10,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:53:10,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:53:10,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:53:10,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:53:10,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:53:10,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:53:10,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:53:10,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:53:10,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:53:10,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:53:10,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:53:10,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:53:10,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:53:10,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:53:10,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:53:10,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:53:10,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:53:10,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:53:10,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:53:10,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:53:10,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:53:10,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:53:10,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:53:10,533 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:53:10,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:53:10,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:53:10,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:53:10,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:53:10,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:53:10,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:53:10,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:53:10,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:53:10,534 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:53:10,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:53:10,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:53:10,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:53:10,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:53:10,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:53:10,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:53:10,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:53:10,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:53:10,536 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:53:10,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:53:10,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:53:10,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:53:10,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:53:10,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:53:10,791 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:53:10,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2021-05-06 09:53:10,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e0e6b709/0810d3022a9b44c5b0a86481ec4da936/FLAG054562da7 [2021-05-06 09:53:11,192 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:53:11,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2021-05-06 09:53:11,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e0e6b709/0810d3022a9b44c5b0a86481ec4da936/FLAG054562da7 [2021-05-06 09:53:11,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e0e6b709/0810d3022a9b44c5b0a86481ec4da936 [2021-05-06 09:53:11,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:53:11,213 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:53:11,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:53:11,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:53:11,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:53:11,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c789592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11, skipping insertion in model container [2021-05-06 09:53:11,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:53:11,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:53:11,349 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/prod4br-ll_unwindbound2.c[524,537] [2021-05-06 09:53:11,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:53:11,379 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:53:11,414 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/prod4br-ll_unwindbound2.c[524,537] [2021-05-06 09:53:11,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:53:11,431 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:53:11,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11 WrapperNode [2021-05-06 09:53:11,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:53:11,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:53:11,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:53:11,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:53:11,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:53:11,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:53:11,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:53:11,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:53:11,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (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 09:53:11,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:53:11,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:53:11,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:53:11,498 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:53:11,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:53:11,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:53:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:53:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:53:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:53:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:53:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:53:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:53:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:53:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:53:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:53:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:53:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:53:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:53:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:53:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:53:11,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:53:11,739 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 09:53:11,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:11 BoogieIcfgContainer [2021-05-06 09:53:11,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:53:11,741 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:53:11,741 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:53:11,741 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:53:11,743 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:53:11 BasicIcfg [2021-05-06 09:53:11,752 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:53:11,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:53:11,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:53:11,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:53:11,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:53:11" (1/4) ... [2021-05-06 09:53:11,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467e67d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:53:11, skipping insertion in model container [2021-05-06 09:53:11,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (2/4) ... [2021-05-06 09:53:11,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467e67d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:53:11, skipping insertion in model container [2021-05-06 09:53:11,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:11" (3/4) ... [2021-05-06 09:53:11,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467e67d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:53:11, skipping insertion in model container [2021-05-06 09:53:11,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:53:11" (4/4) ... [2021-05-06 09:53:11,756 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.cJordan [2021-05-06 09:53:11,760 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:53:11,774 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:53:11,792 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:53:11,803 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:53:11,804 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:53:11,804 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:53:11,804 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:53:11,804 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:53:11,804 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:53:11,804 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:53:11,804 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:53:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:53:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:53:11,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:11,838 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:11,838 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2021-05-06 09:53:11,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:11,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187085803] [2021-05-06 09:53:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:12,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:53:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:12,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:53:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:12,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:12,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187085803] [2021-05-06 09:53:12,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187085803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:12,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:12,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:53:12,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204999506] [2021-05-06 09:53:12,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:53:12,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:53:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:53:12,060 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:12,127 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-06 09:53:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:53:12,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:53:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:12,134 INFO L225 Difference]: With dead ends: 33 [2021-05-06 09:53:12,134 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 09:53:12,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:53:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 09:53:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-06 09:53:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:53:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-06 09:53:12,163 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-06 09:53:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:12,163 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-06 09:53:12,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-06 09:53:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:53:12,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:12,164 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:12,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:53:12,165 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:12,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:12,166 INFO L82 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2021-05-06 09:53:12,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:12,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121962379] [2021-05-06 09:53:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:12,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:12,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358065724] [2021-05-06 09:53:12,192 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 09:53:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:12,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 09:53:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:12,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:12,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:12,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121962379] [2021-05-06 09:53:12,361 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:12,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358065724] [2021-05-06 09:53:12,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358065724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:12,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:12,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:53:12,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847298308] [2021-05-06 09:53:12,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:53:12,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:12,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:53:12,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:53:12,364 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:53:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:12,374 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-05-06 09:53:12,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:53:12,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 09:53:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:12,376 INFO L225 Difference]: With dead ends: 29 [2021-05-06 09:53:12,376 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 09:53:12,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:53:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 09:53:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 09:53:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:53:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 09:53:12,385 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-06 09:53:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:12,385 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 09:53:12,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:53:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 09:53:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:53:12,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:12,389 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:12,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 09:53:12,606 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:12,607 INFO L82 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2021-05-06 09:53:12,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:12,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438208169] [2021-05-06 09:53:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:12,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:12,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59435667] [2021-05-06 09:53:12,623 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 09:53:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:12,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:53:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:12,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:12,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:12,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438208169] [2021-05-06 09:53:12,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:12,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59435667] [2021-05-06 09:53:12,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59435667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:12,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:12,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:53:12,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410129916] [2021-05-06 09:53:12,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:53:12,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:12,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:53:12,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:53:12,728 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:12,772 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 09:53:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:53:12,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 09:53:12,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:12,773 INFO L225 Difference]: With dead ends: 40 [2021-05-06 09:53:12,773 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 09:53:12,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:53:12,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 09:53:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-06 09:53:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 09:53:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 09:53:12,777 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-06 09:53:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:12,778 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 09:53:12,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 09:53:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 09:53:12,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:12,778 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:12,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:12,993 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2021-05-06 09:53:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:12,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944413405] [2021-05-06 09:53:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:13,001 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:13,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071666530] [2021-05-06 09:53:13,001 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 09:53:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 09:53:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:13,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:13,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944413405] [2021-05-06 09:53:13,279 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:13,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071666530] [2021-05-06 09:53:13,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071666530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:13,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:13,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 09:53:13,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527768966] [2021-05-06 09:53:13,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 09:53:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:13,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 09:53:13,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:53:13,281 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:13,545 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-05-06 09:53:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 09:53:13,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 09:53:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:13,547 INFO L225 Difference]: With dead ends: 49 [2021-05-06 09:53:13,547 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 09:53:13,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-06 09:53:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 09:53:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 09:53:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:53:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 09:53:13,551 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-06 09:53:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:13,551 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 09:53:13,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:13,551 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 09:53:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:53:13,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:13,552 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:13,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:13,761 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:13,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:13,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2021-05-06 09:53:13,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:13,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689788151] [2021-05-06 09:53:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:13,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:13,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552604906] [2021-05-06 09:53:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:13,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:53:13,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:13,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:13,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689788151] [2021-05-06 09:53:13,883 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:13,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552604906] [2021-05-06 09:53:13,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552604906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:13,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:13,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 09:53:13,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639340334] [2021-05-06 09:53:13,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:53:13,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:13,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:53:13,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:53:13,885 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 09:53:13,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:13,910 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:53:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:53:13,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-06 09:53:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:13,911 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:53:13,911 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:53:13,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:53:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:53:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 09:53:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:53:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-05-06 09:53:13,915 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 27 [2021-05-06 09:53:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:13,915 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-05-06 09:53:13,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 09:53:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-05-06 09:53:13,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:53:13,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:13,915 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:14,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:14,121 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:14,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2116787731, now seen corresponding path program 1 times [2021-05-06 09:53:14,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:14,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897000309] [2021-05-06 09:53:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:14,128 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:14,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166063566] [2021-05-06 09:53:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:53:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:14,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:14,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:14,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897000309] [2021-05-06 09:53:14,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:14,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166063566] [2021-05-06 09:53:14,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166063566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:14,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:14,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:53:14,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406851932] [2021-05-06 09:53:14,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:53:14,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:53:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:53:14,410 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:14,529 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-05-06 09:53:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:53:14,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-06 09:53:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:14,530 INFO L225 Difference]: With dead ends: 61 [2021-05-06 09:53:14,530 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 09:53:14,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:53:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 09:53:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 09:53:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:53:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 09:53:14,533 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-05-06 09:53:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:14,534 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 09:53:14,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:14,534 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 09:53:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:53:14,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:14,534 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:14,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:14,743 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:14,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1857795251, now seen corresponding path program 1 times [2021-05-06 09:53:14,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:14,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247830623] [2021-05-06 09:53:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:14,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:14,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478971407] [2021-05-06 09:53:14,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 09:53:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:14,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:14,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:14,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247830623] [2021-05-06 09:53:14,930 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:14,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478971407] [2021-05-06 09:53:14,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478971407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:14,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:14,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 09:53:14,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993456379] [2021-05-06 09:53:14,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 09:53:14,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:14,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 09:53:14,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:53:14,933 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:15,110 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2021-05-06 09:53:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 09:53:15,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 09:53:15,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:15,111 INFO L225 Difference]: With dead ends: 64 [2021-05-06 09:53:15,111 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 09:53:15,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 09:53:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 09:53:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 09:53:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:53:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-05-06 09:53:15,115 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2021-05-06 09:53:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:15,115 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-05-06 09:53:15,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-05-06 09:53:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 09:53:15,116 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:15,116 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:15,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:15,325 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:15,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2004143825, now seen corresponding path program 1 times [2021-05-06 09:53:15,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:15,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466889313] [2021-05-06 09:53:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:15,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:15,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680521983] [2021-05-06 09:53:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:15,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 09:53:15,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:15,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:15,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:15,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466889313] [2021-05-06 09:53:15,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:15,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680521983] [2021-05-06 09:53:15,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680521983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:15,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:15,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:53:15,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417560293] [2021-05-06 09:53:15,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:53:15,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:15,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:53:15,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:53:15,461 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:15,818 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2021-05-06 09:53:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:53:15,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 09:53:15,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:15,819 INFO L225 Difference]: With dead ends: 77 [2021-05-06 09:53:15,819 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 09:53:15,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:53:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 09:53:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-06 09:53:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:53:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-05-06 09:53:15,823 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 29 [2021-05-06 09:53:15,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:15,823 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-05-06 09:53:15,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-05-06 09:53:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 09:53:15,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:15,824 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:16,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:16,033 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:16,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1116640144, now seen corresponding path program 1 times [2021-05-06 09:53:16,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:16,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597018575] [2021-05-06 09:53:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:16,040 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:16,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847266078] [2021-05-06 09:53:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:16,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 09:53:16,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:16,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:16,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:16,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597018575] [2021-05-06 09:53:16,280 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:16,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847266078] [2021-05-06 09:53:16,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847266078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:16,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:16,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:53:16,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799493055] [2021-05-06 09:53:16,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:53:16,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:16,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:53:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:53:16,282 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:16,544 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2021-05-06 09:53:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:53:16,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 09:53:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:16,545 INFO L225 Difference]: With dead ends: 85 [2021-05-06 09:53:16,545 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 09:53:16,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:53:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 09:53:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-06 09:53:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:53:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-05-06 09:53:16,549 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 29 [2021-05-06 09:53:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:16,549 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-05-06 09:53:16,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-05-06 09:53:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:53:16,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:16,550 INFO L523 BasicCegarLoop]: trace histogram [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 09:53:16,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 09:53:16,760 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1454559031, now seen corresponding path program 1 times [2021-05-06 09:53:16,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:16,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323648242] [2021-05-06 09:53:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:16,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:16,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876536760] [2021-05-06 09:53:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:16,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:53:16,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:16,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:53:16,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:16,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323648242] [2021-05-06 09:53:16,907 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:16,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876536760] [2021-05-06 09:53:16,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876536760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:16,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:16,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 09:53:16,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956887496] [2021-05-06 09:53:16,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:53:16,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:16,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:53:16,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:53:16,908 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:53:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:16,980 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2021-05-06 09:53:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:53:16,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-06 09:53:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:16,982 INFO L225 Difference]: With dead ends: 90 [2021-05-06 09:53:16,982 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 09:53:16,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:53:16,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 09:53:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2021-05-06 09:53:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:53:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-05-06 09:53:17,001 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 33 [2021-05-06 09:53:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:17,001 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-05-06 09:53:17,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:53:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-05-06 09:53:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 09:53:17,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:17,002 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-05-06 09:53:17,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:17,218 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash 482870923, now seen corresponding path program 1 times [2021-05-06 09:53:17,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:17,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44379772] [2021-05-06 09:53:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:17,225 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:17,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69778268] [2021-05-06 09:53:17,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:17,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 09:53:17,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:17,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 09:53:17,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44379772] [2021-05-06 09:53:17,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69778268] [2021-05-06 09:53:17,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69778268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:17,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:17,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:53:17,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290520645] [2021-05-06 09:53:17,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:53:17,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:17,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:53:17,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:53:17,381 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)